Document:

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                                                                     EXHIBIT 4.7

                         Registration Rights Agreement

                                 $200,000,000

                           VARCO INTERNATIONAL, INC.

                         7 1/4% Senior Notes due 2011

                         REGISTRATION RIGHTS AGREEMENT
                         -----------------------------

May 1, 2001

Credit Suisse First Boston Corporation
Salomon Smith Barney Inc.
RBC Dominion Securities Corporation
Simmons & Company International
c/o Credit Suisse First Boston Corporation
Eleven Madison Avenue
New York, New York 10010-3629

Dear Sirs:

     Varco International, Inc., a Delaware corporation (the "Issuer"), proposes
to issue and sell to Credit Suisse First Boston Corporation, Salomon Smith
Barney Inc., RBC Dominion Securities Corporation and Simmons & Company
International (collectively, the "Initial Purchasers"), upon the terms set forth
in a purchase agreement of even date herewith (the "Purchase Agreement"),
$200,000,000 aggregate principal amount of its 7 1/4% Senior Notes due 2011 (the
"Initial Securities") to be guaranteed (the "Guaranties") by Varco I/P, Inc.;
Tubo-FGS, LLC; Tuboscope (Holding U.S.) Inc.; Fiber Glass Systems Holdings, LLC;
Fiber Glass Systems, LP; Varco, LP; Quality Tubing Inc.; Tuboscope Pipeline
Services Inc.; and Environmental Procedures Inc. (the "Guarantors" and together
with the Issuer, the "Company"). The Initial Securities will be issued pursuant
to an Indenture, dated as of May 1, 2001, (the "Indenture") among the Issuer,
the Guarantors and Bank of New York Trust Company of Florida (the "Trustee"). As
an inducement to the Initial Purchasers, the Company agrees with the Initial
Purchasers, for the benefit of the holders of the Initial Securities (including,
without limitation, the Initial Purchasers) and the Exchange Securities (as
defined below) (collectively the "Holders"), as follows:

     1.   Registered Exchange Offer. Unless the Registered Exchange Offer (as
defined below) is not permitted by applicable law, the Company shall, at its own
cost, prepare and, not later than 120 days after (or if the 120th day is not a
business day, the first business day thereafter) the date of original issue of
the Initial Securities (the "Issue Date"), file with the Securities and Exchange
Commission (the "Commission") a registration statement (the "Exchange Offer
Registration Statement") on an appropriate form under the Securities Act of
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1933, as amended (the "Securities Act"), with respect to a proposed offer (the
"Registered Exchange Offer") to the Holders of Transfer Restricted Securities
(as defined in Section 6 hereof), who are not prohibited by any law or policy of
the Commission from participating in the Registered Exchange Offer, to issue and
deliver to such Holders, in exchange for the Initial Securities, a like
aggregate principal amount of debt securities (the "Exchange Securities") of the
Company issued under the Indenture and identical in all material respects to the
Initial Securities (except for the transfer restrictions relating to the Initial
Securities and the provisions relating to the matters described in Section 6
hereof) that would be registered under the Securities Act. The Company shall use
its best efforts to cause such Exchange Offer Registration Statement to become
effective under the Securities Act within 180 days (or if the 180th day is not a
business day, the first business day thereafter) after the Issue Date of the
Initial Securities and shall keep the Exchange Offer Registration Statement
effective for not less than 30 days (or longer, if required by applicable law)
after the date notice of the Registered Exchange Offer is mailed to the Holders
(such period being called the "Exchange Offer Registration Period"). The Initial
Securities and the Exchange Securities are herein collectively referred to as
the "Securities."

     If the Company effects the Registered Exchange Offer, the Company will be
entitled to close the Registered Exchange Offer 30 days after the commencement
thereof provided that the Company has accepted all the Initial Securities
theretofore validly tendered in accordance with the terms of the Registered
Exchange Offer.

     Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Company shall promptly commence the Registered
Exchange Offer, it being the objective of such Registered Exchange Offer to
enable each Holder of Transfer Restricted Securities (as defined in Section 6
hereof) electing to exchange the Initial Securities for Exchange Securities
(assuming that such Holder is not an affiliate of the Company within the meaning
of the Securities Act, acquires the Exchange Securities in the ordinary course
of such Holder's business and has no arrangements with any person to participate
in the distribution of the Exchange Securities and is not prohibited by any law
or policy of the Commission from participating in the Registered Exchange Offer)
to trade such Exchange Securities from and after their receipt without any
limitations or restrictions under the Securities Act and without material
restrictions under the securities laws of the several states of the United
States.

     The Company acknowledges that, pursuant to current interpretations by the
Commission's staff of Section 5 of the Securities Act, in the absence of an
applicable exemption therefrom, (i) each Holder which is a broker-dealer
electing to exchange Securities (as defined below), acquired for its own account
as a result of market-making activities or other trading activities, for
Exchange Securities (an "Exchanging Dealer"), is required to deliver a
prospectus containing, among other things, the information set forth in (a)
Annex A hereto on the cover, (b) Annex B hereto in the "Exchange Offer
Procedures" section (or similarly titled section) and the "Purpose of the
Exchange Offer" section (or similarly titled section), and (c) Annex C hereto in
the "Plan of Distribution" section of such prospectus in connection with a sale
of any such Exchange Securities received by such Exchanging Dealer pursuant to
the Registered Exchange Offer and (ii) an Initial Purchaser that elects to sell
Exchange Securities acquired in exchange for Securities constituting any portion
of an unsold allotment is required to deliver a prospectus

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containing the information required by Items 507 or 508 of Regulation S-K under
the Securities Act, as applicable, in connection with such sale.

     The Company shall use its best efforts to keep the Exchange Offer
Registration Statement effective and to amend and supplement the prospectus
contained therein, in order to permit such prospectus to be lawfully delivered
by all persons subject to the prospectus delivery requirements of the Securities
Act for such period of time as such persons must comply with such requirements
in order to resell the Exchange Securities; provided, however, that (i) in the
case where such prospectus and any amendment or supplement thereto must be
delivered by an Exchanging Dealer or an Initial Purchaser, such period shall be
the lesser of 180 days and the date on which all Exchanging Dealers and the
Initial Purchasers have sold all Exchange Securities held by them (unless such
period is extended pursuant to Section 3(j) below) and (ii) the Company shall
make such prospectus and any amendment or supplement thereto, available to any
broker-dealer for use in connection with any resale of any Exchange Securities
for a period of not less than 90 days after the consummation of the Registered
Exchange Offer.

     In connection with the Registered Exchange Offer, the Company shall:

     (a)  mail to each Holder a copy of the prospectus forming part of the
Exchange Offer Registration Statement, together with an appropriate letter of
transmittal and related documents;

     (b)  keep the Registered Exchange Offer open for not less than 30 days (or
longer, if required by applicable law) after the date notice thereof is mailed
to the Holders;

     (c)  utilize the services of a depositary for the Registered Exchange Offer
with an address in the Borough of Manhattan, The City of New York, which may be
the Trustee or an affiliate of the Trustee;

     (d)  permit Holders to withdraw tendered Securities at any time prior to
the close of business, New York time, on the last business day on which the
Registered Exchange Offer shall remain open; and

     (e)  otherwise comply with all applicable laws.

     As soon as practicable after the close of the Registered Exchange Offer, as
the case may be, the Company shall:

     (x)  accept for exchange all the Securities validly tendered and not
withdrawn pursuant to the Registered Exchange Offer;

     (y)  deliver to the Trustee for cancellation all the Initial Securities so
accepted for exchange; and

     (z)  cause the Trustee to authenticate and deliver promptly to each Holder
of the Initial Securities, Exchange Securities equal in principal amount to the
Initial Securities of such Holder so accepted for exchange.

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     The Indenture will provide that the Exchange Securities will not be subject
to the transfer restrictions set forth in the Indenture and that all the
Securities shall be considered collectively to be a single class for all
purposes of the Indenture, including, without limitations waivers, amendments,
redemptions and offers to purchase.

     Interest on each Exchange Security issued pursuant to the Registered
Exchange Offer will accrue from the last interest payment date on which interest
was paid on the Initial Securities surrendered in exchange therefor or, if no
interest has been paid on the Initial Securities, from the date of original
issue of the Initial Securities.

     Each Holder participating in the Registered Exchange Offer shall be
required to represent to the Company that at the time of the consummation of the
Registered Exchange Offer (i) any Exchange Securities received by such Holder
will be acquired in the ordinary course of business, (ii) such Holder will have
no arrangements or understanding with any person to participate in the
distribution of the Securities within the meaning of the Securities Act, (iii)
such Holder is not an "affiliate," as defined in Rule 405 of the Securities Act,
of the Company or if it is an affiliate, such Holder will comply with the
registration and prospectus delivery requirements of the Securities Act to the
extent applicable, (iv) if such Holder is not a broker-dealer, that it is not
engaged in, and does not intend to engage in, the distribution of the Exchange
Securities and (v) if such Holder is a broker-dealer, that it will receive
Exchange Securities for its own account in exchange for Initial Securities that
were acquired as a result of market-making activities or other trading
activities and that it will be required to acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities.

     Notwithstanding any other provisions hereof, the Company will ensure that
(i) any Exchange Offer Registration Statement and any amendment thereto and any
prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations
thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer Registration Statement, and any supplement to
such prospectus, does not include an untrue statement of a material fact or omit
to state a material fact required to be stated therein or necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading.

     2.   Shelf Registration. If, (i) because of any change in law or in
applicable interpretations thereof by the staff of the Commission, the Company
is not permitted to effect a Registered Exchange Offer, as contemplated by
Section 1 hereof, (ii) the Registered Exchange Offer is not consummated within
180 days of the Issue Date, (iii) any Initial Purchaser so requests with respect
to the Initial Securities not eligible to be exchanged for Exchange Securities
in the Registered Exchange Offer and held by it following consummation of the
Registered Exchange Offer or (iv) any Exchanging Dealer is not eligible to
participate in the Registered Exchange Offer or, in the case of any Holder
(other than an Exchanging Dealer) that participates in the

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Registered Exchange Offer, such Holder does not receive freely tradeable
Exchange Securities on the date of the exchange, the Company shall take the
following actions:

     (a)  The Company shall, at its cost, as promptly as practicable (but in no
event later than the later of (i) 120 days after (or if the 120th day is not a
business day, the first business day thereafter) the Issue Date and (ii) 60 days
after so otherwise required or requested pursuant to this Section 2) file with
the Commission and thereafter shall use its best efforts to cause to be declared
effective one registration statement (the "Shelf Registration Statement" and,
together with the Exchange Offer Registration Statement, a "Registration
Statement") on an appropriate form under the Securities Act relating to the
offer and sale of the Transfer Restricted Securities (as defined in Section 6
hereof) by the Holders thereof from time to time in accordance with the methods
of distribution set forth in the Shelf Registration Statement and Rule 415 under
the Securities Act (hereinafter, the "Shelf Registration"); provided, however,
that no Holder (other than an Initial Purchaser) shall be entitled to have the
Securities held by it covered by such Shelf Registration Statement unless such
Holder agrees in writing to be bound by all the provisions of this Agreement
applicable to such Holder.

     (b)  The Company shall use its best efforts to keep the Shelf Registration
Statement continuously effective in order to permit the prospectus included
therein to be lawfully delivered by the Holders of the relevant Securities,
until the earlier to occur of (i) the time when the Securities covered by the
Shelf Registration Statement can be sold pursuant to Rule 144 without any
limitations under clauses (c), (e), (f) and (h) of Rule 144 and (ii) two years
(or for such longer period if extended pursuant to Section 3(j) below) from the
Issue Date or such shorter period that will terminate when all the Securities
covered by the Shelf Registration Statement (a) have been sold pursuant thereto
or (b) are no longer restricted securities (as defined in Rule 144 under the
Securities Act, or any successor rule thereof). The Company shall be deemed not
to have used its best efforts to keep the Shelf Registration Statement effective
during the requisite period if it voluntarily takes any action that would result
in Holders of Securities covered thereby not being able to offer and sell such
Securities during that period, unless such action is required by applicable law.

     (c)  Notwithstanding any other provisions of this Agreement to the
contrary, the Company shall cause the Shelf Registration Statement and the
related prospectus and any amendment or supplement thereto, as of the effective
date of the Shelf Registration Statement, amendment or supplement, (i) to comply
in all material respects with the applicable requirements of the Securities Act
and the rules and regulations of the Commission and (ii) not to contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they were made, not misleading.

     3.   Registration Procedures. In connection with any Shelf Registration
contemplated by Section 2 hereof and, to the extent applicable, any Registered
Exchange Offer contemplated by Section 1 hereof, the following provisions shall
apply:

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     (a)  The Company shall (i) furnish to each Initial Purchaser, prior to the
filing thereof with the Commission, a copy of the Registration Statement and
each amendment thereof and each supplement, if any, to the prospectus included
therein and, in the event that an Initial Purchaser (with respect to any portion
of an unsold allotment from the original offering) is participating in the
Registered Exchange Offer or the Shelf Registration Statement, the Company shall
use its best efforts to reflect in each such document, when so filed with the
Commission, such comments as such Initial Purchaser reasonably may propose; (ii)
include the information set forth in Annex A hereto on the cover, in Annex B
hereto in the "Exchange Offer Procedures" section (or similarly titled section)
and the "Purpose of the Exchange Offer" section (or similarly titled section)
and in Annex C hereto in the "Plan of Distribution" section of the prospectus
forming a part of the Exchange Offer Registration Statement and include the
information set forth in Annex D hereto in the Letter of Transmittal delivered
pursuant to the Registered Exchange Offer; (iii) if requested by an Initial
Purchaser, include the information required by Items 507 or 508 of Regulation S-
K under the Securities Act, as applicable, in the prospectus forming a part of
the Exchange Offer Registration Statement; (iv) include within the prospectus
contained in the Exchange Offer Registration Statement a section entitled "Plan
of Distribution," reasonably acceptable to the Initial Purchasers, which shall
contain a summary statement of the positions taken or policies made by the staff
of the Commission with respect to the potential "underwriter" status of any
broker-dealer that is the beneficial owner (as defined in Rule 13d-3 under the
Securities Exchange Act of 1934, as amended (the "Exchange Act")) of Exchange
Securities received by such broker-dealer in the Registered Exchange Offer (a
"Participating Broker-Dealer"), whether such positions or policies have been
publicly disseminated by the staff of the Commission or such positions or
policies, in the reasonable judgment of the Initial Purchasers based upon advice
of counsel (which may be in-house counsel), represent the prevailing views of
the staff of the Commission; and (v) in the case of a Shelf Registration
Statement, include the names of the Holders, who propose to sell Securities
pursuant to the Shelf Registration Statement, as selling securityholders.

     (b)  The Company shall give written notice to the Initial Purchasers, the
Holders of the Securities and any Participating Broker-Dealer from whom the
Company has received prior written notice that it will be a Participating
Broker-Dealer in the Registered Exchange Offer (which notice pursuant to clauses
(ii)-(v) hereof shall be accompanied by an instruction to suspend the use of the
prospectus until the requisite changes have been made):

          (i)   when the Registration Statement or any amendment thereto has
     been filed with the Commission and when the Registration Statement or any
     post-effective amendment thereto has become effective;

          (ii)  of any request by the Commission for amendments or supplements
     to the Registration Statement or the prospectus included therein or for
     additional information;

          (iii) of the issuance by the Commission of any stop order suspending
     the effectiveness of the Registration Statement or the initiation of any
     proceedings for that purpose;

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          (iv)  of the receipt by the Company or its legal counsel of any
     notification with respect to the suspension of the qualification of the
     Securities for sale in any jurisdiction or the initiation or threatening of
     any proceeding for such purpose; and

          (v)   of the happening of any event that requires the Company to make
     changes in the Registration Statement or the prospectus in order that the
     Registration Statement or the prospectus do not contain an untrue statement
     of a material fact nor omit to state a material fact required to be stated
     therein or necessary to make the statements therein (in the case of the
     prospectus, in light of the circumstances under which they were made) not
     misleading.

     (c)  The Company shall make every reasonable effort to obtain the
withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Registration Statement.

     (d)  The Company shall furnish to each Holder of Securities included within
the coverage of the Shelf Registration, without charge, at least one copy of the
Shelf Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, and, if the Holder so requests in writing,
all exhibits thereto (including those, if any, incorporated by reference).

     (e)  The Company shall deliver to each Initial Purchaser, and to any other
Holder who so requests, without charge, at least one copy of the Exchange Offer
Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, and, if any Initial Purchaser or any such
Holder requests, all exhibits thereto (including those incorporated by
reference).

     (f)  The Company shall, during the Shelf Registration Period, deliver to
each Holder of Securities included within the coverage of the Shelf
Registration, without charge, as many copies of the prospectus (including each
preliminary prospectus) included in the Shelf Registration Statement and any
amendment or supplement thereto as such person may reasonably request. The
Company consents, subject to the provisions of this Agreement, to the use of the
prospectus or any amendment or supplement thereto by each of the selling Holders
of the Securities in connection with the offering and sale of the Securities
covered by the prospectus, or any amendment or supplement thereto, included in
the Shelf Registration Statement.

     (g)  The Company shall deliver to each Initial Purchaser, any Exchanging
Dealer, any Participating Broker-Dealer and such other persons required to
deliver a prospectus following the Registered Exchange Offer, without charge, as
many copies of the final prospectus included in the Exchange Offer Registration
Statement and any amendment or supplement thereto as such persons may reasonably
request. The Company consents, subject to the provisions of this Agreement, to
the use of the prospectus or any amendment or supplement thereto by any Initial
Purchaser, if necessary, any Participating Broker-Dealer and such other persons
required to deliver a prospectus following the Registered Exchange Offer in
connection with the offering and sale of the Exchange Securities covered by the
prospectus, or any amendment or supplement thereto, included in such Exchange
Offer Registration Statement.

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     (h)  Prior to any public offering of the Securities, pursuant to any
Registration Statement, the Company shall register or qualify or cooperate with
the Holders of the Securities included therein and their respective counsel in
connection with the registration or qualification of the Securities for offer
and sale under the securities or "blue sky" laws of such states of the United
States as any Holder of the Securities reasonably requests in writing and do any
and all other acts or things necessary or advisable to enable the offer and sale
in such jurisdictions of the Securities covered by such Registration Statement;
provided, however, that the Company shall not be required to (i) qualify
generally to do business in any jurisdiction where it is not then so qualified
or (ii) take any action which would subject it to general service of process or
to taxation in any jurisdiction where it is not then so subject.

     (i)  The Company shall cooperate with the Holders of the Securities to
facilitate the timely preparation and delivery of certificates representing the
Securities to be sold pursuant to any Registration Statement free of any
restrictive legends and in such denominations and registered in such names as
the Holders may request a reasonable period of time prior to sales of the
Securities pursuant to such Registration Statement.

     (j)  Upon the occurrence of any event contemplated by paragraphs (ii)
through (v) of Section 3(b) above during the period for which the Company is
required to maintain an effective Registration Statement, the Company shall
promptly prepare and file a post-effective amendment to the Registration
Statement or a supplement to the related prospectus and any other required
document so that, as thereafter delivered to Holders of the Securities or
purchasers of Securities, the prospectus will not contain an untrue statement of
a material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. If the Company notifies the Initial
Purchasers, the Holders of the Securities and any known Participating Broker-
Dealer in accordance with paragraphs (ii) through (v) of Section 3(b) above to
suspend the use of the prospectus until the requisite changes to the prospectus
have been made, then the Initial Purchasers, the Holders of the Securities and
any such Participating Broker-Dealers shall suspend use of such prospectus, and
the period of effectiveness of the Shelf Registration Statement provided for in
Section 2(b) above and the Exchange Offer Registration Statement provided for in
Section 1 above shall each be extended by the number of days from and including
the date of the giving of such notice to and including the date when the Initial
Purchasers, the Holders of the Securities and any known Participating Broker-
Dealer shall have received such amended or supplemented prospectus pursuant to
this Section 3(j).

     (k)  Not later than the effective date of the applicable Registration
Statement, the Company will provide a CUSIP number for the Initial Securities
and the Exchange Securities and provide the applicable trustee with printed
certificates for the Initial Securities and the Exchange Securities in a form
eligible for deposit with The Depository Trust Company.

     (l)  The Company will comply with all rules and regulations of the
Commission to the extent and so long as they are applicable to the Registered
Exchange Offer or the Shelf Registration and will make generally available to
its security holders (or otherwise provide in accordance with Section 11(a) of
the Securities Act) an earnings statement satisfying the

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provisions of Section 11(a) of the Securities Act, no later than 45 days after
the end of a 12-month period (or 90 days, if such period is a fiscal year)
beginning with the first month of the Company's first fiscal quarter commencing
after the effective date of the Registration Statement, which statement shall
cover such 12-month period.

     (m)  The Company shall cause the Indenture to be qualified under the Trust
Indenture Act of 1939, as amended, in a timely manner and containing such
changes, if any, as shall be necessary for such qualification. In the event that
such qualification would require the appointment of a new trustee under the
Indenture, the Company shall appoint a new trustee thereunder pursuant to the
applicable provisions of the Indenture.

     (n)  The Company may require each Holder of Securities to be sold pursuant
to the Shelf Registration Statement to furnish to the Company such information
regarding the Holder and the distribution of the Securities as the Company may
from time to time reasonably require for inclusion in the Shelf Registration
Statement, and the Company may exclude from such registration the Securities of
any Holder that unreasonably fails to furnish such information within a
reasonable time after receiving such request.

     (o)  The Company shall enter into such customary agreements (including, if
requested, an underwriting agreement in customary form) and take all such other
action, if any, as any Holder of the Securities shall reasonably request in
order to facilitate the disposition of the Securities pursuant to any Shelf
Registration.

     (p)  In the case of any Shelf Registration, the Company shall (i) make
reasonably available for inspection by the Holders of the Securities, any
underwriter participating in any disposition pursuant to the Shelf Registration
Statement and any attorney, accountant or other agent retained by the Holders of
the Securities or any such underwriter all relevant financial and other records,
pertinent corporate documents and properties of the Company and (ii) cause the
Company's officers, directors, employees, accountants and auditors to supply all
relevant information reasonably requested by the Holders of the Securities or
any such underwriter, attorney, accountant or agent in connection with the Shelf
Registration Statement, in each case, as shall be reasonably necessary to enable
such persons, to conduct a reasonable investigation within the meaning of
Section 11 of the Securities Act; provided, however, that the foregoing
inspection and information gathering shall be coordinated on behalf of the
Initial Purchasers by you and on behalf of the other parties, by one counsel
designated by and on behalf of such other parties as described in Section 4
hereof; provided further, that any person to whom information is provided under
this Section 3(p) agrees in writing to maintain the confidentiality of such
information to the extent such information is not in the public domain.

     (q)  In the case of any Shelf Registration, the Company, if requested by
any Holder of Securities covered thereby, shall cause (i) its counsel to deliver
an opinion and updates thereof relating to the Securities in customary form
addressed to such Holders and the managing underwriters, if any, thereof and
dated, in the case of the initial opinion, the effective date of such Shelf
Registration Statement covering the matters customarily covered in opinions
requested in underwritten offerings in the form acceptable to the managing
underwriters (ii) its officers to

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execute and deliver all customary documents and certificates and updates thereof
requested by any underwriters of the applicable Securities and (iii) its
independent public accountants to provide to the selling Holders of the
applicable Securities and any underwriter therefor a comfort letter in customary
form and covering matters of the type customarily covered in comfort letters in
connection with primary underwritten offerings, subject to receipt of
appropriate documentation as contemplated, and only if permitted, by Statement
of Auditing Standards No. 72.

     (r)  In the case of the Registered Exchange Offer, if requested by any
Initial Purchaser or any known Participating Broker-Dealer, the Company shall
cause (i) its counsel to deliver to such Initial Purchaser or such Participating
Broker-Dealer a signed opinion in the form set forth in Section 6(c) of the
Purchase Agreement with such changes as are customary in connection with the
preparation of a Registration Statement and (ii) its independent public
accountants to deliver to such Initial Purchaser or such Participating Broker-
Dealer a comfort letter, in customary form, meeting the requirements as to the
substance thereof as set forth in Section 6(a) and 6(f) of the Purchase
Agreement, with appropriate date changes.

     (s)  If a Registered Exchange Offer is to be consummated, upon delivery of
the Initial Securities by Holders to the Company (or to such other Person as
directed by the Company) in exchange for the Exchange Securities, the Company
shall mark, or caused to be marked, on the Initial Securities so exchanged that
such Initial Securities are being canceled in exchange for the Exchange
Securities; in no event shall the Initial Securities be marked as paid or
otherwise satisfied.

     (t)  The Company will use its best efforts to (a) if the Initial Securities
have been rated prior to the initial sale of such Initial Securities, confirm
such ratings will apply to the Securities covered by a Registration Statement,
or (b) if the Initial Securities were not previously rated, cause the Securities
covered by a Registration Statement to be rated with the appropriate rating
agencies, if so requested by Holders of a majority in aggregate principal amount
of Securities covered by such Registration Statement, or by the managing
underwriters, if any.

     (u)  In the event that any broker-dealer registered under the Exchange Act
shall underwrite any Securities or participate as a member of an underwriting
syndicate or selling group or "assist in the distribution" (within the meaning
of the Conduct Rules (the "Rules") of the National Association of Securities
Dealers, Inc. ("NASD")) thereof, whether as a Holder of such Securities or as an
underwriter, a placement or sales agent or a broker or dealer in respect
thereof, or otherwise, the Company will assist such broker-dealer in complying
with the requirements of such Rules, including, without limitation, by (i) if
such Rules, including Rule 2720, shall so require, engaging a "qualified
independent underwriter" (as defined in Rule 2720) to participate in the
preparation of the Registration Statement relating to such Securities, to
exercise usual standards of due diligence in respect thereto and, if any portion
of the offering contemplated by such Registration Statement is an underwritten
offering or is made through a placement or sales agent, to recommend the yield
of such Securities, (ii) indemnifying any such qualified independent underwriter
to the extent of the indemnification of underwriters provided

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in Section 5 hereof and (iii) providing such information to such broker-dealer
as may be required in order for such broker-dealer to comply with the
requirements of the Rules.

     (v)  The Company shall use its best efforts to take all other steps
necessary to effect the registration of the Securities covered by a Registration
Statement contemplated hereby.

     4.   Registration Expenses. The Company shall bear all fees and expenses
incurred in connection with the performance of its obligations under Sections 1
through 3 hereof (including the reasonable fees and expenses, if any, of Simpson
Thacher & Bartlett, counsel for the Initial Purchasers, incurred in connection
with the Registered Exchange Offer), whether or not the Registered Exchange
Offer or a Shelf Registration is filed or becomes effective, and, in the event
of a Shelf Registration, shall bear or reimburse the Holders of the Securities
covered thereby for the reasonable fees and disbursements of one firm of counsel
designated by the Holders of a majority in principal amount of the Initial
Securities covered thereby to act as counsel for the Holders of the Initial
Securities in connection therewith.

     5.   Indemnification. (a) The Company agrees to indemnify and hold harmless
each Holder of the Securities, any Participating Broker-Dealer and each person,
if any, who controls such Holder or such Participating Broker-Dealer within the
meaning of the Securities Act or the Exchange Act (each Holder, any
Participating Broker-Dealer and such controlling persons are referred to
collectively as the "Indemnified Parties") from and against any losses, claims,
damages or liabilities, joint or several, or any actions in respect thereof
(including, but not limited to, any losses, claims, damages, liabilities or
actions relating to purchases and sales of the Securities) to which each
Indemnified Party may become subject under the Securities Act, the Exchange Act
or otherwise, insofar as such losses, claims, damages, liabilities or actions
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained in a Registration Statement or prospectus or in any
amendment or supplement thereto or in any preliminary prospectus relating to a
Shelf Registration, or arise out of, or are based upon, the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, and shall reimburse, as
incurred, the Indemnified Parties for any legal or other expenses reasonably
incurred by them in connection with investigating or defending any such loss,
claim, damage, liability or action in respect thereof; provided, however, that
(i) the Company shall not be liable in any such case to the extent that such
loss, claim, damage or liability arises out of or is based upon any untrue
statement or alleged untrue statement or omission or alleged omission made in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration in reliance
upon and in conformity with written information pertaining to such Holder and
furnished to the Company by or on behalf of such Holder specifically for
inclusion therein and (ii) with respect to any untrue statement or omission or
alleged untrue statement or omission made in any preliminary prospectus relating
to a Shelf Registration Statement, the indemnity agreement contained in this
subsection (a) shall not inure to the benefit of any Holder or Participating
Broker-Dealer from whom the person asserting any such losses, claims, damages or
liabilities purchased the Securities concerned, to the extent that a prospectus
relating to such Securities was required to be delivered by such Holder or
Participating Broker-Dealer under the Securities Act in connection with such
purchase and any

                                      11
<PAGE>

such loss, claim, damage or liability of such Holder or Participating Broker-
Dealer results from the fact that there was not sent or given to such person, at
or prior to the written confirmation of the sale of such Securities to such
person, a copy of the final prospectus if the Company had previously furnished
copies thereof to such Holder or Participating Broker-Dealer; provided further,
however, that this indemnity agreement will be in addition to any liability
which the Company may otherwise have to such Indemnified Party. The Company
shall also indemnify underwriters, their officers and directors and each person
who controls such underwriters within the meaning of the Securities Act or the
Exchange Act to the same extent as provided above with respect to the
indemnification of the Holders of the Securities if requested by such Holders.

     (b)  Each Holder of the Securities, severally and not jointly, will
indemnify and hold harmless the Company and its officers and directors and each
person, if any, who controls the Company within the meaning of the Securities
Act or the Exchange Act from and against any losses, claims, damages or
liabilities or any actions in respect thereof, to which the Company or any such
controlling person may become subject under the Securities Act, the Exchange Act
or otherwise, insofar as such losses, claims, damages, liabilities or actions
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained in a Registration Statement or prospectus or in any
amendment or supplement thereto or in any preliminary prospectus relating to a
Shelf Registration, or arise out of or are based upon the omission or alleged
omission to state therein a material fact necessary to make the statements
therein not misleading, but in each case only to the extent that the untrue
statement or omission or alleged untrue statement or omission was made in
reliance upon and in conformity with written information pertaining to such
Holder and furnished to the Company by or on behalf of such Holder specifically
for inclusion therein; and, subject to the limitation set forth immediately
preceding this clause, shall reimburse, as incurred, the Company for any legal
or other expenses reasonably incurred by the Company or any such controlling
person in connection with investigating or defending any loss, claim, damage,
liability or action in respect thereof. This indemnity agreement will be in
addition to any liability which such Holder may otherwise have to the Company or
any of its controlling persons.

     (c)  Promptly after receipt by an indemnified party under this Section 5 of
notice of the commencement of any action or proceeding (including a governmental
investigation), such indemnified party will, if a claim in respect thereof is to
be made against the indemnifying party under this Section 5, notify the
indemnifying party of the commencement thereof; but the omission so to notify
the indemnifying party will not, in any event, relieve the indemnifying party
from any obligations to any indemnified party other than the indemnification
obligation provided in paragraph (a) or (b) above. In case any such action is
brought against any indemnified party, and it notifies the indemnifying party of
the commencement thereof, the indemnifying party will be entitled to participate
therein and, to the extent that it may wish, jointly with any other indemnifying
party similarly notified, to assume the defense thereof, with counsel reasonably
satisfactory to such indemnified party (who shall not, except with the consent
of the indemnified party, be counsel to the indemnifying party), and after
notice from the indemnifying party to such indemnified party of its election so
to assume the defense thereof the indemnifying party will not be liable to such
indemnified party under this Section 5 for any legal or other expenses, other
than reasonable costs of investigation, subsequently incurred by such

                                      12
<PAGE>

indemnified party in connection with the defense thereof. No indemnifying party
shall, without the prior written consent of the indemnified party, effect any
settlement of any pending or threatened action in respect of which any
indemnified party is or could have been a party and indemnity could have been
sought hereunder by such indemnified party unless such settlement includes an
unconditional release of such indemnified party from all liability on any claims
that are the subject matter of such action.

     (d)  If the indemnification provided for in this Section 5 is unavailable
or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to in subsection (a) or (b)
above (i) in such proportion as is appropriate to reflect the relative benefits
received by the indemnifying party or parties on the one hand and the
indemnified party on the other from the exchange of the Securities, pursuant to
the Registered Exchange Offer, or (ii) if the allocation provided by the
foregoing clause (i) is not permitted by applicable law, in such proportion as
is appropriate to reflect not only the relative benefits referred to in clause
(i) above but also the relative fault of the indemnifying party or parties on
the one hand and the indemnified party on the other in connection with the
statements or omissions that resulted in such losses, claims, damages or
liabilities (or actions in respect thereof) as well as any other relevant
equitable considerations. The relative fault of the parties shall be determined
by reference to, among other things, whether the untrue or alleged untrue
statement of a material fact or the omission or alleged omission to state a
material fact relates to information supplied by the Company on the one hand or
such Holder or such other indemnified party, as the case may be, on the other,
and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The amount paid by
an indemnified party as a result of the losses, claims, damages or liabilities
referred to in the first sentence of this subsection (d) shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in connection with investigating or defending any action or claim which is
the subject of this subsection (d). Notwithstanding any other provision of this
Section 5(d), the Holders of the Securities shall not be required to contribute
any amount in excess of the amount by which the net proceeds received by such
Holders from the sale of the Securities pursuant to a Registration Statement
exceeds the amount of damages which such Holders have otherwise been required to
pay by reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. For purposes
of this paragraph (d), each person, if any, who controls such indemnified party
within the meaning of the Securities Act or the Exchange Act shall have the same
rights to contribution as such indemnified party and each person, if any, who
controls the Company within the meaning of the Securities Act or the Exchange
Act shall have the same rights to contribution as the Company.

     (e)  The agreements contained in this Section 5 shall survive the sale of
the Securities pursuant to a Registration Statement and shall remain in full
force and effect, regardless of any termination or cancellation of this
Agreement or any investigation made by or on behalf of any indemnified party.

                                      13
<PAGE>

     6.    Additional Interest Under Certain Circumstances. (a) Additional
interest (the "Additional Interest") with respect to the Initial Securities
shall be assessed as follows if any of the following events occur (each such
event in clauses (i) through (iii) below a "Registration Default":

     (i)   If by August 29, 2001, neither the Exchange Offer Registration
Statement nor a Shelf Registration Statement has been filed with the Commission;

     (ii)  If by October 29, 2001, neither the Registered Exchange Offer is
consummated nor, if required in lieu thereof, the Shelf Registration Statement
is declared effective by the Commission; or

     (iii) If after either the Exchange Offer Registration Statement or the
Shelf Registration Statement is declared effective (A) such Registration
Statement thereafter ceases to be effective; or (B) such Registration Statement
or the related prospectus ceases to be usable (except as permitted in paragraph
(b)) in connection with resales of Transfer Restricted Securities during the
periods specified herein because either (1) any event occurs as a result of
which the related prospectus forming part of such Registration Statement would
include any untrue statement of a material fact or omit to state any material
fact necessary to make the statements therein in the light of the circumstances
under which they were made not misleading, or (2) it shall be necessary to amend
such Registration Statement or supplement the related prospectus, to comply with
the Securities Act or the Exchange Act or the respective rules thereunder.

Additional Interest shall accrue on the Initial Securities over and above the
interest set forth in the title of the Securities from and including the date on
which any such Registration Default shall occur to but excluding the date on
which all such Registration Defaults have been cured (such period shall be
referred to herein as the "Registration Default Period"), at a rate of 0.25% per
annum for the first 90 days of the Registration Default period and at a rate of
0.50% per annum thereafter for the remaining period of the Registration Default
Period.

     (b)   A Registration Default referred to in Section 6(a)(iii)(B) hereof
shall be deemed not to have occurred and be continuing in relation to a Shelf
Registration Statement or the related prospectus if (i) such Registration
Default has occurred solely as a result of (x) the filing of a post-effective
amendment to such Shelf Registration Statement to incorporate annual audited
financial information with respect to the Company where such post-effective
amendment is not yet effective and needs to be declared effective to permit
Holders to use the related prospectus or (y) other material events, with respect
to the Company that would need to be described in such Shelf Registration
Statement or the related prospectus and (ii) in the case of clause (y), the
Company is proceeding promptly and in good faith to amend or supplement such
Shelf Registration Statement and related prospectus to describe such events;
provided, however, that in any case if such Registration Default occurs for a
continuous period in excess of 30 days, Additional Interest shall be payable in
accordance with the above paragraph from the day such Registration Default
occurs until such Registration Default is cured.

     (c)   Any amounts of Additional Interest due pursuant to clause (i), (ii)
or (iii) of Section 6(a) above will be payable in cash on the regular interest
payment dates with respect to the Initial

                                       14
<PAGE>

Securities. The amount of Additional Interest will be determined by multiplying
the applicable Additional Interest rate by the principal amount of the Initial
Securities, multiplied by a fraction, the numerator of which is the number of
days such Additional Interest rate was applicable during such period (determined
on the basis of a 360-day year comprised of twelve 30-day months), and the
denominator of which is 360.

     (d)  "Transfer Restricted Securities" means each Security until (i) the
date on which such Transfer Restricted Security has been exchanged by a person
other than a broker-dealer for a freely transferable Exchange Security in the
Registered Exchange Offer, (ii) following the exchange by a broker-dealer in the
Registered Exchange Offer of an Initial Security for an Exchange Note, the date
on which such Exchange Note is sold to a purchaser who receives from such
broker-dealer on or prior to the date of such sale a copy of the prospectus
contained in the Exchange Offer Registration Statement, (iii) the date on which
such Initial Security has been effectively registered under the Securities Act
and disposed of in accordance with the Shelf Registration Statement or (iv) the
date on which such Initial Security is distributed to the public pursuant to
Rule 144 under the Securities Act or is saleable pursuant to Rule 144(k) or
another substantially similar resale exemption promulgated in the future under
the Securities Act.

     7.   Rules 144 and 144A. The Company shall use its best efforts to file the
reports required to be filed by it under the Securities Act and the Exchange Act
in a timely manner and, if at any time the Company is not required to file such
reports, it will, upon the request of any Holder of Initial Securities, make
publicly available other information so long as necessary to permit sales of
their securities pursuant to Rules 144 and 144A. The Company covenants that it
will take such further action as any Holder of Initial Securities may reasonably
request, all to the extent required from time to time to enable such Holder to
sell Initial Securities without registration under the Securities Act within the
limitation of the exemptions provided by Rules 144 and 144A (including the
requirements of Rule 144A(d)(4)). The Company will provide a copy of this
Agreement to prospective purchasers of Initial Securities identified to the
Company by the Initial Purchasers upon request. Upon the request of any Holder
of Initial Securities, the Company shall deliver to such Holder a written
statement as to whether it has complied with such requirements. Notwithstanding
the foregoing, nothing in this Section 7 shall be deemed to require the Company
to register any of its securities pursuant to the Exchange Act.

     8.   Underwritten Registrations. If any of the Transfer Restricted
Securities covered by any Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("Managing Underwriters") will be selected by
the Holders of a majority in aggregate principal amount of such Transfer
Restricted Securities to be included in such offering and shall be reasonably
acceptable to the Company. The Company shall pay the fees and expenses of such
investment bankers and managers only to the extent specifically provided in
Section 4. In no event shall the Company be responsible for paying any
underwriting discounts or commissions in connection with such underwritten
offering.

     No person may participate in any underwritten registration hereunder unless
such person (i) agrees to sell such person's Transfer Restricted Securities on
the basis reasonably provided in

                                       15
<PAGE>

any underwriting arrangements approved by the persons entitled hereunder to
approve such arrangements and (ii) completes and executes all questionnaires,
powers of attorney, indemnities, underwriting agreements and other documents
reasonably required under the terms of such underwriting arrangements.

     9.   Miscellaneous.

     (a)  Amendments and Waivers. The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Company and the written
consent of the Holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents.
Notwithstanding the foregoing, a waiver or consent to departure from the
provisions hereof that relates exclusively to the rights of Holders whose
securities are being tendered pursuant to the Exchange Offer and that does not
affect directly or indirectly the rights of other Holders whose securities are
not being tendered pursuant to such Exchange Offer may be given by the Holders
of a majority of the outstanding principal amount of Transfer Restricted
Securities being tendered or registered.

     (b)  Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

               (1)  if to a Holder of the Securities, at the most current
address given by such Holder to the Company.

               (2)  if to the Initial Purchasers;

                         Credit Suisse First Boston Corporation
                         Eleven Madison Avenue
                         New York, NY 10010-3629
                         Fax No.:  (212) 325-8278
                         Attention:  Transactions Advisory Group

  with a copy to:

                         Simpson Thacher & Bartlett
                         425 Lexington Ave.
                         New York, NY  10017
                         Attention:  Wilson S. Neely

               (3)  if to the Company, at its address as follows:

                         Varco International, Inc.
                         2835 Holmes Road
                         Houston, Texas  77051
                         Attention:  General Counsel

                                       16
<PAGE>

  with a copy to:    Latham & Watkins
                     650 Town Center Drive, 20th Floor
                     Costa Mesa, California  92626-1918
                     Attention:  Patrick T. Seaver

     All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery.

     (c)  No Inconsistent Agreements. The Company has not, as of the date
hereof, entered into, nor shall it, on or after the date hereof, enter into, any
agreement with respect to its securities that is inconsistent with the rights
granted to the Holders herein or otherwise conflicts with the provisions hereof.

     (d)  Successors and Assigns. This Agreement shall be binding upon (i) the
successors and assigns of each of the parties to this Agreement, without the
need for an express assignment, and (ii) subsequent Holders of the Securities.

     (e)  Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

     (f)  Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

     (g)  Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

     (h)  Severability. If any one or more of the provisions contained herein,
or the application thereof in any circumstance, is held invalid, illegal or
unenforceable, the validity, legality and enforceability of any such provision
in every other respect and of the remaining provisions contained herein shall
not be affected or impaired thereby.

     (i)  Securities Held by the Company. Whenever the consent or approval of
Holders of a specified percentage of principal amount of Securities is required
hereunder, Securities held by the Company or its affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

                                       17
<PAGE>

     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Issuer a counterpart hereof, whereupon this
instrument, along with all counterparts, will become a binding agreement among
the several Initial Purchasers, the Issuer and the Guarantors in accordance with
its terms.

                              Very truly yours,

                              VARCO INTERNATIONAL, INC.

                              By: /s/ Joseph C. Winkler
                                 ------------------------------
                                 Name:  Joseph C. Winkler
                                 Title: Executive Vice President,
                                        Chief Financial
                                        Officer and Treasurer

                              VARCO I/P, INC.
                              TUBO-FGS, LLC
                              TUBOSCOPE (HOLDING U.S.) INC.
                              FIBER GLASS SYSTEMS HOLDINGS, LLC
                              FIBER GLASS SYSTEMS, LP
                              VARCO, LP
                              QUALITY TUBING INC.
                              TUBOSCOPE PIPELINE SERVICES INC.
                              ENVIRONMENTAL PROCEDURES INC.

                              By: /s/ Joseph C. Winkler
                                 ------------------------------
                                 Name:  Joseph C. Winkler
                                 Title: Vice President

The foregoing Registration
Rights Agreement is hereby confirmed
and accepted as of the date first
above written.

CREDIT SUISSE FIRST BOSTON CORPORATION
SALOMON SMITH BARNEY INC.
RBC DOMINION SECURITIES CORPORATION
SIMMONS & COMPANY INTERNATIONAL

By:  CREDIT SUISSE FIRST BOSTON CORPORATION

       By: /s/ Osmar Abib
          -----------------------------
       Name:  Osmar Abib
       Title: Managing Director

                                       18
<PAGE>

                                                                         ANNEX A

     Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities.  The
Letter of Transmittal states that by so acknowledging and by delivering a
prospectus, a broker-dealer will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.  This Prospectus, as it
may be amended or supplemented from time to time, may be used by a broker-dealer
in connection with resales of Exchange Securities received in exchange for
Initial Securities where such Initial Securities were acquired by such broker-
dealer as a result of market-making activities or other trading activities.  The
Company has agreed that, for a period of 180 days after the Expiration Date (as
defined herein), it will make this Prospectus available to any broker-dealer for
use in connection with any such resale. See "Plan of Distribution."

                                       19
<PAGE>

                                                                         ANNEX B

     Each broker-dealer that receives Exchange Securities for its own account in
exchange for Securities, where such Initial Securities were acquired by such
broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Securities. See "Plan of Distribution."
<PAGE>

                                                                         ANNEX C

PLAN OF DISTRIBUTION

     Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities.  This
Prospectus, as it may be amended or supplemented from time to time, may be used
by a broker-dealer in connection with resales of Exchange Securities received in
exchange for Initial Securities where such Initial Securities were acquired as a
result of market-making activities or other trading activities.  The Company has
agreed that, for a period of 180 days after the Expiration Date, it will make
this prospectus, as amended or supplemented, available to any broker-dealer for
use in connection with any such resale.  In addition, until                   ,
200 , all dealers effecting transactions in the Exchange Securities may be
required to deliver a prospectus. 1

     The Company will not receive any proceeds from any sale of Exchange
Securities by broker-dealers.  Exchange Securities received by broker-dealers
for their own account pursuant to the Exchange Offer may be sold from time to
time in one or more transactions in the over-the-counter market, in negotiated
transactions, through the writing of options on the Exchange Securities or a
combination of such methods of resale, at market prices prevailing at the time
of resale, at prices related to such prevailing market prices or negotiated
prices.  Any such resale may be made directly to purchasers or to or through
brokers or dealers who may receive compensation in the form of commissions or
concessions from any such broker-dealer or the purchasers of any such Exchange
Securities.  Any broker-dealer that resells Exchange Securities that were
received by it for its own account pursuant to the Exchange Offer and any broker
or dealer that participates in a distribution of such Exchange Securities may be
deemed to be an "underwriter" within the meaning of the Securities Act and any
profit on any such resale of Exchange Securities and any commission or
concessions received by any such persons may be deemed to be underwriting
compensation under the Securities Act.  The Letter of Transmittal states that,
by acknowledging that it will deliver and by delivering a prospectus, a broker-
dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

     For a period of 180 days after the Expiration Date the Company will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal.  The Company has agreed to pay all expenses
incident to the Exchange Offer (including the expenses of one counsel for the
Holders of the Securities) other than commissions or concessions of any brokers
or dealers and will indemnify the Holders of the Securities (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.

-------------------
1    In addition, the legend required by Item 502(e) of Regulation S-K will
     appear on the back cover page of the Exchange Offer prospectus.
<PAGE>

                                                                         ANNEX D

[_]  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
     COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
     THERETO.

          Name:  _____________________________________________
          Address: ___________________________________________
                   ___________________________________________

If the undersigned is not a broker-dealer, the undersigned represents that it is
not engaged in, and does not intend to engage in, a distribution of Exchange
Securities.  If the undersigned is a broker-dealer that will receive Exchange
Securities for its own account in exchange for Initial Securities that were
acquired as a result of market-making activities or other trading activities, it
acknowledges that it will deliver a prospectus in connection with any resale of
such Exchange Securities; however, by so acknowledging and by delivering a
prospectus, the undersigned will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.<PAGE>

                                                                     EXHIBIT 4.8

                           VARCO INTERNATIONAL, INC.

                                  AS ISSUER,

                         THE GUARANTORS NAMED HEREIN,

                                AS GUARANTORS,

                                      and

                             THE BANK OF NEW YORK

                                  AS TRUSTEE

                     ====================================

                                   INDENTURE

                            Dated as of May 1, 2001

                     ====================================

                                 $200,000,000

                             SERIES A AND SERIES B

                             7 1/4% NOTES DUE 2011
<PAGE>

                            CROSS-REFERENCE TABLE*

<TABLE>
<CAPTION>
TRUST
INDENTURE ACT                                                                              INDENTURE
SECTION                                                                                    SECTION
<S>                                                                                        <C>
310 (a)(1)..............................................................................      6.10
    (a)(2)..............................................................................      6.10
    (a)(3)..............................................................................      N.A.
    (a)(4)..............................................................................      N.A.
    (a)(5)..............................................................................      6.10
    (b).................................................................................      6.10; 7.01(b)
    (c).................................................................................      N.A.
311 (a).................................................................................      6.11
    (b).................................................................................      6.11
    (c).................................................................................      N.A.
312 (a).................................................................................      2.05
    (b).................................................................................     11.03
    (c).................................................................................     11.03
313 (a).................................................................................      6.06
    (b).................................................................................      6.06
    (c).................................................................................      6.06
    (d).................................................................................      6.06
314 (a).................................................................................      3.03
    (b).................................................................................      N.A.
    (c)(1)..............................................................................     11.04
    (c)(2)..............................................................................     11.04
    (c)(3)..............................................................................      N.A.
    (d).................................................................................      N.A.
    (e).................................................................................     11.05
    (f).................................................................................      N.A.
315 (a).................................................................................      6.01(b)
    (b).................................................................................      6.05
    (c).................................................................................      6.01(a)
    (d).................................................................................      6.01(c)
    (e).................................................................................      5.11
316 (a)(last sentence)..................................................................      2.09
    (a)(1)(A)...........................................................................      5.05
    (a)(1)(B)...........................................................................      5.04
    (a)(2)..............................................................................      N.A.
    (b).................................................................................      5.07
    (c).................................................................................      8.04
317 (a)(1)..............................................................................      5.08
    (a)(2)..............................................................................      5.09
    (b).................................................................................      2.04
</TABLE>
<PAGE>

<TABLE>
<S>                                                                                          <C>
318 (a).................................................................................     10.01
318 (c).................................................................................     10.01
</TABLE>

         N.A. means not applicable

         * This Cross-Reference Table is not part of this Indenture
<PAGE>

                               Table of Contents

<TABLE>
<CAPTION>
                                                                                                               Page
<S>                                                                                                            <C>
ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE.........................................................     1
----------------------------------------------------

         SECTION 1.01   Definitions..........................................................................     1
         --------------------------

         SECTION 1.02   Other Definitions....................................................................     7
         --------------------------------

         SECTION 1.03   Incorporation by Reference of Trust Indenture Act....................................     7
         ----------------------------------------------------------------

         SECTION 1.04   Rules of Construction................................................................     8
         ------------------------------------

ARTICLE 2 THE SECURITIES.....................................................................................     8
------------------------

         SECTION 2.01   Form and Dating......................................................................     8
         ------------------------------

         SECTION 2.02   Execution and Authentication.........................................................     9
         -------------------------------------------

         SECTION 2.03   Registrar and Paying Agent...........................................................     9
         -----------------------------------------

         SECTION 2.04   Paying Agent to Hold Money in Trust..................................................    10
         --------------------------------------------------

         SECTION 2.05   Holder Lists.........................................................................    10
         ---------------------------

         SECTION 2.06   Transfer and Exchange................................................................    11
         ------------------------------------

         SECTION 2.07   Replacement Securities...............................................................    17
         -------------------------------------

         SECTION 2.08   Outstanding Securities...............................................................    18
         -------------------------------------

         SECTION 2.09   Treasury Securities..................................................................    18
         ----------------------------------

         SECTION 2.10   Temporary Securities.................................................................    18
         -----------------------------------

         SECTION 2.11   Cancellation.........................................................................    18
         ---------------------------

         SECTION 2.12   Defaulted Interest...................................................................    19
         ---------------------------------

         SECTION 2.13   Persons Deemed Owners................................................................    19
         ------------------------------------

ARTICLE 3 COVENANTS..........................................................................................    19
-------------------

         SECTION 3.01   Payment of Securities................................................................    19
         ------------------------------------

         SECTION 3.02   Maintenance of Office or Agency......................................................    19
         ----------------------------------------------

         SECTION 3.03   SEC Reports; Financial Statements....................................................    20
         ------------------------------------------------
</TABLE>

                                      -i-
<PAGE>

<TABLE>
<S>                                                                                                              <C>
         SECTION 3.04   Compliance Certificate...............................................................    21
         -------------------------------------

         SECTION 3.05   Corporate Existence..................................................................    21
         ----------------------------------

         SECTION 3.06   Maintenance of Properties............................................................    22
         ----------------------------------------

         SECTION 3.07   Payment of Taxes and Other Claims....................................................    22
         ------------------------------------------------

         SECTION 3.08   Waiver of Stay, Extension or Usury Laws..............................................    22
         ------------------------------------------------------

         SECTION 3.09   Limitation on Sale/Leaseback Transactions............................................    23
         --------------------------------------------------------

         SECTION 3.10   Limitation on Liens..................................................................    23
         ----------------------------------

         SECTION 3.11   Registration Rights Agreement........................................................    25
         --------------------------------------------

ARTICLE 4 SUCCESSORS.........................................................................................    25
--------------------

         SECTION 4.01   Limitations on Mergers and Consolidations............................................    25
         --------------------------------------------------------

         SECTION 4.02   Successor Corporation Substituted....................................................    25
         ------------------------------------------------

ARTICLE 5 DEFAULTS AND REMEDIES..............................................................................    26
-------------------------------

         SECTION 5.01   Events of Default....................................................................    26
         --------------------------------

         SECTION 5.02   Acceleration.........................................................................    28
         ---------------------------

         SECTION 5.03   Other Remedies.......................................................................    28
         -----------------------------

         SECTION 5.04   Waiver of Existing Defaults..........................................................    28
         ------------------------------------------

         SECTION 5.05   Control by Majority..................................................................    29
         ----------------------------------

         SECTION 5.06   Limitations on Suits.................................................................    29
         -----------------------------------

         SECTION 5.07   Rights of Holders to Receive Payment.................................................    29
         ---------------------------------------------------

         SECTION 5.08   Collection Suit by Trustee...........................................................    30
         -----------------------------------------

         SECTION 5.09   Trustee May File Proofs of Claim.....................................................    30
         -----------------------------------------------

         SECTION 5.10   Priorities...........................................................................    30
         -------------------------

         SECTION 5.11   Undertaking for Costs................................................................    31
         ------------------------------------

ARTICLE 6 TRUSTEE............................................................................................    31
-----------------

         SECTION 6.01   Duties of Trustee....................................................................    31
         --------------------------------
</TABLE>

                                     -ii-
<PAGE>

<TABLE>
<S>                                                                                                              <C>
         SECTION 6.02   Rights of Trustee....................................................................    32
         --------------------------------

         SECTION 6.03   Individual Rights of Trustee.........................................................    33
         -------------------------------------------

         SECTION 6.04   Trustee's Disclaimer.................................................................    33
         -----------------------------------

         SECTION 6.05   Notice of Defaults...................................................................    33
         ---------------------------------

         SECTION 6.06   Reports by Trustee to Holders........................................................    33
         --------------------------------------------

         SECTION 6.07   Compensation and Indemnity...........................................................    33
         -----------------------------------------

         SECTION 6.08   Replacement of Trustee...............................................................    34
         -------------------------------------

         SECTION 6.09   Successor Trustee by Merger, etc.....................................................    35
         -----------------------------------------------

         SECTION 6.10   Eligibility; Disqualification........................................................    36
         --------------------------------------------

         SECTION 6.11   Preferential Collection of Claims Against Company....................................    36
         ----------------------------------------------------------------

ARTICLE 7 DISCHARGE OF INDENTURE.............................................................................    36
--------------------------------

         SECTION 7.01   Termination of Company's Obligations.................................................    36
         ---------------------------------------------------

         SECTION 7.02   Application of Trust Money...........................................................    38
         -----------------------------------------

         SECTION 7.03   Repayment to Company.................................................................    39
         -----------------------------------

         SECTION 7.04   Reinstatement........................................................................    39
         ----------------------------

ARTICLE 8 AMENDMENTS.........................................................................................    39
--------------------

         SECTION 8.01   Without Consent of Holders...........................................................    39
         -----------------------------------------

         SECTION 8.02   With Consent of Holders..............................................................    40
         --------------------------------------

         SECTION 8.03   Compliance with Trust Indenture Act..................................................    42
         --------------------------------------------------

         SECTION 8.04   Revocation and Effect of Consents....................................................    42
         ------------------------------------------------

         SECTION 8.05   Notation on or Exchange of Securities................................................    42
         ----------------------------------------------------

         SECTION 8.06   Trustee to Sign Amendments, etc......................................................    43
         ----------------------------------------------

ARTICLE 9 GUARANTEES OF SECURITIES...........................................................................    43
----------------------------------

         SECTION 9.01   Unconditional Guarantees.............................................................    43
         ---------------------------------------

         SECTION 9.02   Limitation of Guarantor's Liability..................................................    45
         ---------------------------------------------------
</TABLE>

                                     -iii-
<PAGE>

<TABLE>
<S>                                                                                                              <C>
         SECTION 9.03   Contribution.........................................................................    45
         ---------------------------

         SECTION 9.04   Execution and Delivery of Guarantees.................................................    46
         ---------------------------------------------------

         SECTION 9.05   Addition of Guarantors...............................................................    46
         -------------------------------------

         SECTION 9.06   Release of Guarantee.................................................................    46
         -----------------------------------

         SECTION 9.07   Consent to Jurisdiction and Service of Process.......................................    47
         -------------------------------------------------------------

         SECTION 9.08   Waiver of Immunity...................................................................    47
         ---------------------------------

         SECTION 9.09   Judgment Currency....................................................................    48
         --------------------------------

ARTICLE 10 REDEMPTION........................................................................................    48
---------------------

         SECTION 10.01   Notices to Trustee..................................................................    48
         ----------------------------------

         SECTION 10.02   Selection of Securities to be Redeemed..............................................    48
         ------------------------------------------------------

         SECTION 10.03   Notices to Holders..................................................................    49
         ----------------------------------

         SECTION 10.04   Effect of Notices of Redemption.....................................................    50
         -----------------------------------------------

         SECTION 10.05   Deposit of Redemption Price.........................................................    50
         -------------------------------------------

         SECTION 10.06   Securities Redeemed in Part.........................................................    50
         -------------------------------------------

         SECTION 10.07   Optional Redemption.................................................................    50
         -----------------------------------

ARTICLE 11 MISCELLANEOUS.....................................................................................    51
------------------------

         SECTION 11.01   Trust Indenture Act Controls........................................................    51
         --------------------------------------------

         SECTION 11.02   Notices.............................................................................    51
         -----------------------

         SECTION 11.03   Communication by Holders with Other Holders.........................................    52
         -----------------------------------------------------------

         SECTION 11.04   Certificate and Opinion as to Conditions Precedent..................................    52
         ------------------------------------------------------------------

         SECTION 11.05   Statements Required in Certificate or Opinion.......................................    52
         -------------------------------------------------------------

         SECTION 11.06   Rules by Trustee and Agents.........................................................    53
         -------------------------------------------

         SECTION 11.07   Legal Holidays......................................................................    53
         ------------------------------

         SECTION 11.08   No Recourse Against Others..........................................................    53
         ------------------------------------------

         SECTION 11.09   Governing Law.......................................................................    53
         -----------------------------
</TABLE>

                                     -iv-
<PAGE>

<TABLE>
         <S>                                                                                                     <C>
         SECTION 11.10   No Adverse Interpretation of Other Agreements.......................................    53
         -------------------------------------------------------------

         SECTION 11.11   Successors..........................................................................    54
         --------------------------

         SECTION 11.12   Severability........................................................................    54
         ----------------------------

         SECTION 11.13   Counterpart Originals...............................................................    54
         -------------------------------------

         SECTION 11.14   Table of Contents, Headings, etc....................................................    54
         ------------------------------------------------
</TABLE>

                                      -v-
<PAGE>

     INDENTURE dated as of May 1, 2001 between Varco International, Inc., a
Delaware corporation (the "Company"), the entities listed on Schedule I hereto
(each a "Guarantor" and collectively, the "Guarantors") and The Bank of New
York, a New York banking corporation (the "Trustee").

     Each party agrees as follows for the benefit of the other parties and for
the equal and ratable benefit of the Holders of the Company's 7 1/4% Series A
Notes due 2011 (the "Series A Securities") and the Company's 7 1/4% Series B
Notes due 2011 (the "Series B Securities"):

                                   ARTICLE 1

                  DEFINITIONS AND INCORPORATION BY REFERENCE

     SECTION 1.01 Definitions.

     "Adjusted Net Assets" of a Guarantor at any date means the lesser of (x)
the amount by which the fair value of the property of such Guarantor at such
date exceeds the total amount of liabilities, including, without limitation, the
probable amount of contingent liabilities (after giving effect to all other
fixed and contingent liabilities incurred or assumed on such date) of such
Guarantor at such date, but excluding liabilities under the Guarantee of such
Guarantor, and (y) the amount by which the present fair saleable value of the
assets of such Guarantor at such date exceeds the amount that will be required
to pay the probable liability of such Guarantor on its debts (after giving
effect to all other fixed and contingent liabilities incurred or assumed on such
date and after giving effect to any collection from any Subsidiary of such
Guarantor in respect of any obligations of such Subsidiary under the Guarantee
of such Guarantor), excluding debt in respect of the Guarantee of such
Guarantor, as they become absolute and matured.

     "Affiliate" of any specified Person means any Person directly or indirectly
controlling or controlled by, or under direct or indirect common control with,
such specified Person. For purposes of this definition, "control" of a Person
shall mean the power to direct the management and policies of such Person,
directly or indirectly, whether through the ownership of voting securities, by
contract or otherwise, and the terms "controlling" and "controlled" shall have
meanings correlative to the foregoing. The Trustee may request and may
conclusively rely upon an Officers' Certificate to determine whether any Person
is an Affiliate of any specified Person.

     "Agent" means any Registrar or Paying Agent.

     "Attributable Indebtedness," when used with respect to any Sale/Leaseback
Transaction, means, as at the time of determination, the present value
(discounted at the rate set forth or implicit in the terms of the lease included
in such transaction) of the total obligations of the lessee for rental payments
(other than amounts required to be paid on account of property taxes,
maintenance, repairs, insurance, assessments, utilities, operating and labor
costs and other items which do not constitute payments for property rights)
during the remaining term of the lease
<PAGE>

included in such Sale/Leaseback Transaction (including any period for which such
lease has been extended).

     "Bank Credit Facility" means Amended and Restated Credit Agreement dated as
of February 9, 1998 among the Company and Chase Bank of Texas, National
Association, ABN AMRO Bank N.V., Houston Agency and the Other Lenders Party
thereto and ABN AMRO Bank N.V., Houston Agency as Administrative Agent.

     "Bankruptcy Law" means Title 11, U.S. Code or any similar federal, state or
foreign law for the relief of debtors.

     "Board of Directors" means the Board of Directors of the Company or any
committee thereof duly authorized, with respect to any particular matter, to act
by or on behalf of the Board of Directors of the Company.

     "Business Day" means any day that is not a Legal Holiday.

     "Capital Stock" of any Person means and includes any and all shares,
interests, rights to purchase, warrants or options (whether or not currently
exercisable), participations or other equivalents of or interests in (however
designated) the equity (which includes, but is not limited to, common stock,
preferred stock and partnership and joint venture interests) of such Person
(excluding any debt securities that are convertible into, or exchangeable for,
such equity).

     "Capitalized Lease Obligation" of any Person means any obligation of such
Person to pay rent or other amounts under a lease of property, real or personal,
that is required to be capitalized for financial reporting purposes in
accordance with GAAP; and the amount of such obligation shall be the capitalized
amount thereof determined in accordance with GAAP.

     "Common Equity" of any Person means and includes all Capital Stock of such
Person that is generally entitled to (i) vote in the election of directors of
such Person, or (ii) if such Person is not a corporation, vote or otherwise
participate in the selection of the governing body, partners, managers or others
that will control the management and policies of such Person.

     "Company" means the Person named as the "Company" in the first paragraph of
this instrument until a successor corporation shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor corporation; provided, however, that for purposes of any
provision contained herein which is required by the TIA, "Company" shall also
mean each Guarantor, if any.

     "Consolidated Net Worth" of the Company means the consolidated
stockholders' equity of the Company and its Subsidiaries, as determined in
accordance with GAAP.

     "Corporate Trust Office of the Trustee" means the office of the Trustee in
the Borough of Manhattan, The City of New York at which the corporate trust
business of the Trustee shall be principally administered, which office shall
initially be located at the address of the Trustee

                                      -2-
<PAGE>

specified in Section 3.02 hereof and may be located at such other address as the
Trustee may give notice to the Company.

     "Default" means any event, act or condition that is, or after notice or the
passage of time or both would be, an Event of Default.

     "Definitive Securities" means Securities that are in the form of Exhibit A
attached hereto (but without including the text referred to in footnotes 1 and 2
thereto and the Schedule of Exchanges of Securities).

     "Depositary" means, with respect to the Securities issuable or issued in
whole or in part in global form, the Person specified in Section 2.03 hereof as
the Depositary with respect to the Securities, until a successor shall have been
appointed and become such pursuant to the applicable provision of this
Indenture, and, thereafter, "Depositary" shall mean or include such successor.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended, and
any successor statute.

     "Exchange Offer" means the offer that may be made by the Company pursuant
to a Registration Rights Agreement to exchange Series B Notes for Series A
Notes.

     "Exchange Offer Registration Statement" means a registration statement
under the Securities Act relating to an Exchange Offer, including the related
prospectus.

     "Funded Indebtedness" means all Indebtedness (including Indebtedness
incurred under any revolving credit, letter of credit or working capital
facility) that matures by its terms, or that is renewable at the option of any
obligor thereon to a date, more than one year after the date on which such
Indebtedness is originally incurred.

     "GAAP" means generally accepted accounting principles in the United States
set forth in the opinions and pronouncements of the Accounting Principles Board
of the American Institute of Certified Public Accountants and statements and
pronouncements of the Financial Accounting Standards Board or in such other
statements by such other entity as may be approved by a significant segment of
the accounting profession of the United States, as in effect from time to time.

     "Global Security" means a Security that is issued in global form in the
name of Cede & Co. or such other name as may be requested by an authorized
representative of the Depositary, and that contains the text referred to in
footnotes 1 and 2 and the additional schedule referred to in the form of
Security attached hereto as Exhibit A.

     "Guarantor" means (i) each Subsidiary of the Company listed on Schedule I
hereto executing this Indenture, (ii) each Subsidiary of the Company that
becomes a guarantor of the Securities pursuant to Section 9.05 hereof, (iii)
each Subsidiary of the Company that executes a

                                      -3-
<PAGE>

supplemental indenture in which such Subsidiary agrees to be bound by Article 9
hereof and (iv) any Subsidiary of the Company that is a successor corporation of
any Subsidiary of the Company referred to in clauses (i) through (iii). The term
"Guarantor" shall not include any Subsidiary of the Company referred to in
clauses (i) through (iv) that shall have been released from its obligations
under Article 9 pursuant to Section 9.06 hereof.

     "Hedging Obligations" of any Person means the net obligations (not the
notional amount) of such Person pursuant to any interest rate swap agreement,
foreign currency exchange agreement, interest rate collar agreement, option or
futures contract or other similar agreement or arrangement relating to interest
rates or foreign exchange rates.

     "Holder" means a Person in whose name a Security is registered.

     "Indebtedness" of any Person at any date means, without duplication, (i)
all indebtedness of such Person for borrowed money (whether or not the recourse
of the lender is to the whole of the assets of such Person or only to a portion
thereof), (ii) all obligations of such Person evidenced by bonds, debentures,
notes or other similar instruments, (iii) all obligations of such Person in
respect of letters of credit or other similar instruments (or reimbursement
obligations with respect thereto), other than standby letters of credit and
performance bonds issued by such Person in the ordinary course of business, to
the extent not drawn or, to the extent drawn, if such drawing is reimbursed not
later than the third Business Day following demand for reimbursement, (iv) all
obligations of such Person to pay the deferred and unpaid purchase price of
property or services, except trade payables and accrued expenses incurred in the
ordinary course of business, (v) all Capitalized Lease Obligations of such
Person, (vi) all Indebtedness of others secured by a Lien on any asset of such
Person, whether or not such Indebtedness is assumed by such Person, (vii) all
Indebtedness of others guaranteed by such Person to the extent of such guarantee
and (viii) all Hedging Obligations of such Person.

     "Indenture" means this Indenture as amended or supplemented from time to
time.

     "Initial Purchasers" means Credit Suisse First Boston Corporation, Salomon
Smith Barney Inc., RBC Dominion Securities Corporation and Simmons & Company
International as initial purchasers in the Offering.

     "Interest Payment Date" shall have the meaning assigned to such term in the
Securities.

     "Issue Date" means the first date on which the Series A Securities are
issued under this Indenture.

     "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in any of The City of New York, Houston, Texas or a place of
payment are authorized or obligated by law, regulation or executive order to
remain closed.

     "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset,
whether or not filed, recorded or

                                      -4-
<PAGE>

otherwise perfected under applicable law. For the purposes of this Indenture,
the Company or any Subsidiary of the Company shall be deemed to own subject to a
Lien any asset which it has acquired or holds subject to the interest of a
vendor or lessor under any conditional sale agreement, Capitalized Lease
Obligation or other title retention agreement relating to such asset.

     "Net Proceeds" means, with respect to any Sale/Leaseback Transaction
entered into by the Company or any Subsidiary of the Company, the aggregate net
proceeds received by the Company or such Subsidiary from such Sale/Leaseback
Transaction after payment of expenses, taxes, commissions and similar amounts
incurred in connection therewith, whether such proceeds are in cash or in
property (valued at the fair market value thereof at the time of receipt, as
determined by the Board of Directors).

     "Non-Recourse Indebtedness" means, at any date, the aggregate amount at
such date of Indebtedness of the Company or a Subsidiary of the Company in
respect of which the recourse of the holder of such Indebtedness, whether direct
or indirect and whether contingent or otherwise, is effectively limited to
specified assets, and with respect to which neither the Company nor any of its
Subsidiaries provides any credit support.

     "Offering" means the offering of the Original Securities pursuant to the
Offering Circular.

     "Offering Circular" means the Offering Circular of the Company, dated April
26, 2001, relating to the Offering.

     "Officer" means the Chairman of the Board, the President, any Vice Chairman
of the Board, any Vice President, the chief financial officer, the Treasurer,
any Assistant Treasurer, the Controller, the Secretary or any Assistant
Secretary of a Person.

     "Officers' Certificate" means a certificate signed by two Officers of a
Person, one of whom must be the Person's chief executive officer, chief
financial officer or chief accounting officer.

     "Opinion of Counsel" means a written opinion from legal counsel who is
acceptable to the Trustee. Such counsel may be an employee of or counsel to the
Company, a Guarantor or the Trustee.

     "Original Securities" has the meaning set forth in Section 2.02 hereof.

     "Pari Passu Indebtedness" means any Indebtedness of the Company, whether
outstanding on the Issue Date or thereafter created, incurred or assumed,
unless, in the case of any particular Indebtedness, the instrument creating or
evidencing the same or pursuant to which the same is outstanding expressly
provides that such Indebtedness shall be subordinated in right of payment to the
Securities.

     "Person" means any individual, corporation, partnership, limited liability
company, joint venture, incorporated or unincorporated association, joint-stock
company, trust, unincorporated

                                      -5-
<PAGE>

organization or government or other agency or political subdivision thereof or
other entity of any kind.

     "Redemption Date," when used with respect to any security to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.

     "Redemption Price" shall have the meaning assigned to such term in the
Securities.

     "Registration Rights Agreement" means (a) that certain Registration Rights
Agreement, dated as of May 1, 2001, among the Company, the Guarantors party
thereto and the Initial Purchasers relating to the Original Securities and (b)
any similar agreements that the Company and the Guarantors may enter into in
relation to any other Series A Securities.

     "Sale/Leaseback Transaction" means any arrangement with any Person
providing for the leasing by the Company or any Subsidiary of the Company, for a
period of more than three years, of any real or tangible personal property,
which property has been or is to be sold or transferred by the Company or such
Subsidiary to such Person in contemplation of such leasing.

     "SEC" means the Securities and Exchange Commission.

     "Securities" means the Series A Securities and the Series B Securities
treated as a single class of Securities. For purposes of this Indenture, the
term "Securities" shall, except where the context otherwise requires, include
the Guarantees.

     "Securities Act" means the Securities Act of 1933, as amended, and any
successor statute.

     "Security Custodian" means the Trustee, as custodian with respect to the
Securities in global form, or any successor entity thereto.

     "Series A Securities" means the Company's 7 1/4% Series A Notes due 2011 to
be issued pursuant to this Indenture.

     "Series B Securities" means the Company's 7 1/4% Series B Notes due 2011 to
be issued pursuant to this Indenture in the Exchange Offer.

     "Subsidiary" of any Person means (i) any corporation of which at least a
majority of the aggregate voting power of all classes of the Common Equity is
owned by such Person directly or through one or more other Subsidiaries of such
Person, and (ii) any entity other than a corporation at least a majority of the
Common Equity of which is owned by such Person directly or through one or more
other Subsidiaries of such Person.

     "TIA" means the Trust Indenture Act of 1939, as amended (15 U.S.C. Sections
77aaa-77bbbb), as in effect on the Issue Date.

                                      -6-
<PAGE>

     "Transfer Restricted Securities" shall have the meaning assigned to such
term in the Registration Rights Agreement.

     "Trust Officer" means any officer or assistant officer of the Trustee
assigned by the Trustee to administer its corporate trust matters.

     "Trustee" means the party named as such above until a successor replaces it
in accordance with the applicable provisions of this Indenture and thereafter
means the successor serving hereunder.

     "U.S. Government Obligations" means direct obligations of the United States
of America for the payment of which the full faith and credit of the United
States of America is pledged.

     SECTION 1.02 Other Definitions.

<TABLE>
<CAPTION>
                                                                Defined
      Term                                                      in Section
      ----                                                      ----------
      <S>                                                       <C>
      "Authorized Agent"......................................  9.07
       "Custodian"............................................  5.01
       "DTC"..................................................  2.03
       "Event of Default".....................................  5.01
       "Funding Guarantor"....................................  9.03
       "Guarantees"...........................................  9.01(a)
       "Judgement Currency"...................................  9.09
       "Non-U.S. Guarantor"...................................  9.07
       "Paying Agent".........................................  2.03
       "Registrar"............................................  2.03
       "Significant Subsidiary"...............................  5.01
       "Successor"............................................  4.01
</TABLE>

     SECTION 1.03 Incorporation by Reference of Trust Indenture Act.

     Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture. The following
TIA terms used in this Indenture have the following meanings:

     "Commission" means the SEC.

     "indenture securities" means the Securities.

     "indenture security holder" means a Holder.

     "indenture to be qualified" means this Indenture.

     "indenture trustee" or "institutional trustee" means the Trustee.

                                      -7-
<PAGE>

     "obligor" on the indenture securities means the Company and each Guarantor.

     All terms used in this Indenture that are defined by the TIA, defined by a
TIA reference to another statute or defined by an SEC rule under the TIA have
the meanings so assigned to them.

     SECTION 1.04 Rules of Construction.

     Unless the context otherwise requires:

          (i)    a term has the meaning assigned to it;

          (ii)   an accounting term not otherwise defined has the meaning
                 assigned to it in accordance with GAAP;

          (iii)  "or" is not exclusive;

          (iv)   words in the singular include the plural, and in the plural
                 include the singular; and

          (v)    provisions apply to successive events and transactions.

                                   ARTICLE 2

                                THE SECURITIES

     SECTION 2.01 Form and Dating.

     The Securities, the notations thereon relating to the Guarantees and the
Trustee's certificate of authentication shall be substantially in the form of
Exhibit A to this Indenture, the terms of which are hereby incorporated into
this Indenture. The Securities may have notations, legends or endorsements
required by law, securities exchange rule, the Company's certificate of
incorporation or bylaws, agreements to which the Company is subject, if any, or
usage (provided that any such notation, legend or endorsement is in a form
acceptable to the Company). Each Security shall be dated the date of its
authentication. The Securities shall be in registered form without coupons and
only in denominations of $1,000 and any integral multiples thereof. The terms
and provisions contained in the Securities shall constitute, and are hereby
expressly made, a part of this Indenture and to the extent applicable, the
Company, the Guarantors and the Trustee, by their execution and delivery of this
Indenture, expressly agree to such terms and provisions and to be bound thereby.

     The Securities will initially be issued in the form of one or more global
Securities, substantially in the form of Exhibit A attached hereto (including
footnotes 1 and 2 thereto). A Global Security shall represent such of the
outstanding Securities as shall be specified therein

                                      -8-
<PAGE>

and shall provide that it shall represent the aggregate amount of outstanding
Securities from time to time endorsed thereon and that the aggregate amount of
outstanding Securities represented thereby may from time to time be reduced or
increased, as appropriate, to reflect exchanges, repurchases and redemptions.
Any endorsement of Global Securities to reflect the amount of any increase or
decrease in the amount of outstanding Securities represented thereby shall be
made by the Trustee in accordance with instructions given by the Holder thereof
as required by Section 2.06 hereof.

     SECTION 2.02 Execution and Authentication.

     One Officer of the Company shall sign the Securities on behalf of the
Company, and one Officer of each Guarantor shall sign the notation on the
Securities relating to the Guarantees on behalf of such Guarantor, in each case
by manual or facsimile signature. The Company's seal may be impressed, affixed,
imprinted or reproduced on the Securities and may be in facsimile form.

     If an Officer of the Company or any Guarantor whose signature is on a
Security no longer holds that office at the time the Security is authenticated,
the Security shall be valid nevertheless.

     A Security shall not be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose until authenticated by the manual signature
of an authorized signatory of the Trustee, which signature shall be conclusive
evidence that the Security has been authenticated under this Indenture.

     The Trustee shall authenticate (i) Series A Securities for original issue
on the Issue Date in the aggregate principal amount of $200,000,000 (the
"Original Securities"), (ii) additional Series A Securities for original issue
from time to time after the Issue Date in such principal amounts as may be set
forth in a written order of the Company described in this sentence and (iii)
Series B Securities for original issue, pursuant to an Exchange Offer for a like
principal amount of Series A Securities, in each case, upon a written order of
the Company signed by one Officer of the Company. Such order shall specify (a)
the amount of the Securities to be authenticated and the date of original issue
thereof, (b) to what extent, if any, such Securities will be represented by a
Global Security and one or more Definitive Securities and (c) whether the
Securities are Series A Securities or Series B Securities. The aggregate
principal amount of Securities outstanding at any time may not exceed
$200,000,000 plus such additional principal amounts as may be issued pursuant to
clause (ii) of this paragraph, except as provided in Section 2.07 hereof.

     The Trustee may appoint an authenticating agent acceptable to the Company
to authenticate Securities. Unless limited by the terms of such appointment, an
authenticating agent may authenticate Securities whenever the Trustee may do so.
Each reference in this Indenture to authentication by the Trustee includes
authentication by such agent. An authenticating agent has the same rights as an
Agent to deal with the Company, the Guarantors or an Affiliate of any of them.

                                      -9-
<PAGE>

     The Series A Securities and the Series B Securities shall be considered
collectively to be a single class for all purposes of this Indenture, including,
without limitations waivers, amendments, redemptions and offers to purchase.

     SECTION 2.03 Registrar and Paying Agent.

     The Company shall maintain an office or agency where Securities may be
presented for registration of transfer or exchange ("Registrar") and an office
or agency where Securities may be presented for payment ("Paying Agent"). The
Registrar shall keep a register of the Securities and of their transfer and
exchange. The Company may appoint one or more co-registrars and one or more
additional paying agents. The term "Registrar" includes any co-registrar and the
term "Paying Agent" includes any additional paying agent.

     The Company shall enter into an appropriate agency agreement with any
Registrar or Paying Agent not a party to this Indenture. The agreement shall
implement the provisions of this Indenture that relate to such Agent. The
Company shall notify the Trustee of the name and address of any Agent not a
party to this Indenture. The Company may change any Paying Agent or Registrar
without notice to any Holder. If the Company fails to appoint or maintain
another entity as Registrar or Paying Agent, the Trustee shall act as such. The
Company or any of its Subsidiaries may act as Paying Agent or Registrar.

     The Company initially appoints the Trustee as Registrar and Paying Agent.

     The Company initially appoints The Depository Trust Company ("DTC") to act
as Depositary with respect each Global Security.

     SECTION 2.04 Paying Agent to Hold Money in Trust.

     The Company shall require each Paying Agent other than the Trustee to agree
in writing that the Paying Agent will hold in trust for the benefit of Holders
or the Trustee all money held by the Paying Agent for the payment of principal
of or premium, if any, or interest on the Securities, whether such money shall
have been paid to it by the Company or any Guarantor, and will notify the
Trustee of any default by the Company or any Guarantor in making any such
payment. While any such default continues, the Trustee may require a Paying
Agent to pay all money held by it to the Trustee and to account for any funds
disbursed. The Company at any time may require a Paying Agent to pay all money
held by it to the Trustee and to account for any funds disbursed. Upon payment
over to the Trustee and upon accounting for any funds disbursed, the Paying
Agent (if other than the Company or a Subsidiary of the Company) shall have no
further liability for the money. If the Company or a Subsidiary of the Company
acts as Paying Agent, it shall segregate and hold in a separate trust fund for
the benefit of the Holders all money held by it as Paying Agent.

                                      -10-
<PAGE>

     SECTION 2.05 Holder Lists.

     The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Holders and shall otherwise comply with TIA Section 312(a). If the Trustee is
not the Registrar, the Company shall furnish to the Trustee at least seven
Business Days before each Interest Payment Date, and at such other times as the
Trustee may request in writing, a list in such form and as of such date as the
Trustee may reasonably require of the names and addresses of Holders, and the
Company shall otherwise comply with TIA Section 312(a).

     SECTION 2.06 Transfer and Exchange.

     (a) Transfer and Exchange of Definitive Securities. When Definitive
Securities are presented to the Registrar with the request:

          (x)  to register the transfer of the Definitive Securities, or

          (y)  to exchange such Definitive Securities for an equal principal
               amount of Definitive Securities of the same series and other
               authorized denominations,

the Registrar shall register the transfer or make the exchange as requested if
its requirements for such transactions are met; provided, however, that the
Definitive Securities presented or surrendered for registration of transfer or
exchange:

          (i)  shall be duly endorsed or accompanied by a written instruction of
               transfer in form satisfactory to the Registrar duly executed by
               the Holder thereof or by his attorney, duly authorized in
               writing; and

          (ii) in the case of Transfer Restricted Securities that are Definitive
               Securities, shall be accompanied by the following additional
               information and documents, as applicable, upon which the
               Registrar may conclusively rely:

               (A)  if such Transfer Restricted Securities are being delivered
                    to the Registrar by a Holder for registration in the name of
                    such Holder, without transfer, a certification from such
                    Holder to that effect (in substantially the form of Exhibit
                    B hereto); or

               (B)  if such Transfer Restricted Securities are being transferred
                    (1) to a "qualified institutional buyer" (as defined in Rule
                    144A under the Securities Act) in accordance with Rule 144A
                    under the Securities Act or (2) pursuant to an exemption
                    from registration in accordance with Rule 144 under the
                    Securities Act (and based upon an opinion of counsel if the
                    Company so requests) or (3) pursuant to an effective
                    registration statement under the Securities

                                      -11-
<PAGE>

                    Act, a certification to that effect from such Holder (in
                    substantially the form of Exhibit B hereto); or

               (C)  if such Transfer Restricted Securities are being transferred
                    to an institutional "accredited investor," within the
                    meaning of Rule 501(a)(1), (2), (3) or (7) under the
                    Securities Act pursuant to a private placement exemption
                    from the registration requirements of the Securities Act
                    (and based upon an opinion of counsel if the Company so
                    requests), a certification to that effect from such Holder
                    (in substantially the form of Exhibit B hereto) and a
                    certification from the applicable transferee (in
                    substantially the form of Exhibit C hereto);

               (D)  if such Transfer Restricted Securities are being transferred
                    pursuant to an exemption from registration in accordance
                    with Rule 904 under the Securities Act (and based upon an
                    opinion of counsel if the Company so requests),
                    certifications to that effect from such Holder (in
                    substantially the form of Exhibits B and D hereto); or

               (E)  if such Transfer Restricted Securities are being transferred
                    in reliance on another exemption from the registration
                    requirements of the Securities Act (and based upon an
                    opinion of counsel if the Company so requests), a
                    certification to that effect from such Holder (in
                    substantially the form of Exhibit B hereto).

     (b)  Restriction on Transfer of a Definitive Security for a Beneficial
Interest in a Global Security. A Definitive Security may not be exchanged for a
beneficial interest in a Global Security of the same series except upon
satisfaction of the requirements set forth below. Upon receipt by the Trustee of
a Definitive Security, duly endorsed or accompanied by appropriate instruments
of transfer, in form satisfactory to the Trustee, together with:

          (i)  if such Definitive Security is a Transfer Restricted Security,
               certification, substantially in the form of Exhibit B hereto,
               upon which the Trustee may conclusively rely, that such
               Definitive Security is being transferred to a "qualified
               institutional buyer" (as defined in Rule 144A under the
               Securities Act) in accordance with Rule 144A under the Securities
               Act; or

          (ii) if such Definitive Security is a Transfer Restricted Security and
               is being transferred pursuant to an exemption from registration
               in accordance with Rule 904 under the Securities Act (and based
               upon an opinion of counsel if the Company so requests),
               certifications to that effect from such Holder (in substantially
               the form of Exhibits B and D hereto); and

                                      -12-
<PAGE>

          (iii)  whether or not such Definitive Security is a Transfer
                 Restricted Security, written instructions directing the Trustee
                 to make, or direct the Security Custodian to make, an
                 endorsement on the Global Security to reflect an increase in
                 the aggregate principal amount of the Securities represented by
                 the Global Security;

     then the Trustee shall cancel such Definitive Security in accordance with
Section 2.11 hereof and cause, or direct the Security Custodian to cause, in
accordance with the standing instructions and procedures existing between the
Depositary and the Security Custodian, the aggregate principal amount of
Securities represented by the Global Security to be increased accordingly. If no
Global Securities are then outstanding, the Company shall issue and the Trustee
shall authenticate a new Global Security in the appropriate principal amount.

     (c)  Transfer and Exchange of Global Securities. The transfer and exchange
of Global Securities or beneficial interests therein shall be effected through
the Depositary, in accordance with this Indenture (including the restrictions on
transfer set forth herein) and the procedures of the Depositary therefor, which
shall include restrictions on transfer comparable to those set forth herein to
the extent required by the Securities Act.

     (d)  Transfer of a Beneficial Interest in a Global Security for a
Definitive Security.

          (i)  Any Person having a beneficial interest in a Global Security may
               upon request exchange such beneficial interest for a Definitive
               Security of the same series. Upon receipt by the Trustee of
               written instructions or such other form of instructions as is
               customary for the Depositary, from the Depositary or its nominee
               on behalf of any Person having a beneficial interest in a Global
               Security, and in the case of a Transfer Restricted Security, the
               following additional information and documents (all of which may
               be submitted by facsimile), upon which the Trustee may
               conclusively rely:

               (A)  if such beneficial interest is being transferred to the
                    Person designated by the Depositary as being the beneficial
                    owner, a certification from such Person to that effect (in
                    substantially the form of Exhibit B hereto); or

               (B)  if such beneficial interest is being transferred (1) to a
                    "qualified institutional buyer" (as defined in Rule 144A
                    under the Securities Act) in accordance with Rule 144A under
                    the Securities Act or (2) pursuant to an exemption from
                    registration in accordance with Rule 144 under the
                    Securities Act (and based upon an opinion of counsel if the
                    Company so requests) or (3) pursuant to an effective
                    registration statement under the Securities Act, a
                    certification to

                                      -13-
<PAGE>

                    that effect from the transferor (in substantially the form
                    of Exhibit B hereto); or

               (C)  if such beneficial interest is being transferred to an
                    institutional "accredited investor," within the meaning of
                    Rule 501(a)(1), (2), (3) or (7) under the Securities Act
                    pursuant to a private placement exemption from the
                    registration requirements of the Securities Act (and based
                    upon an opinion of counsel if the Company so requests), a
                    certification to that effect from such transferor (in
                    substantially the form of Exhibit B hereto) and a
                    certification from the applicable transferee (in
                    substantially the form of Exhibit C hereto); or

               (D)  if such beneficial interest is being transferred pursuant to
                    an exemption from registration in accordance with Rule 904
                    under the Securities Act (and based upon an opinion of
                    counsel if the Company so requests), certifications to that
                    effect from such transferor (in substantially the form of
                    Exhibits B and D hereto); or

               (E)  if such beneficial interest is being transferred in reliance
                    on another exemption from the registration requirements of
                    the Securities Act (and based upon an opinion of counsel if
                    the Company so requests), a certification to that effect
                    from such transferor (in substantially the form of Exhibit B
                    hereto);

     then the Trustee or the Security Custodian, at the direction of the
Trustee, shall, in accordance with the standing instructions and procedures
existing between the Depositary and the Security Custodian, cause the aggregate
principal amount of Global Securities to be reduced accordingly and, following
such reduction, the Company shall execute and the Trustee shall authenticate and
deliver to the transferee a Definitive Security of the same series and in the
appropriate principal amount.

          (ii) Definitive Securities issued in exchange for a beneficial
               interest in a Global Security pursuant to this Section 2.06(d)
               shall be registered in such names and in such authorized
               denominations as the Depositary, pursuant to instructions from
               its direct or indirect participants or otherwise, shall instruct
               the Trustee. The Trustee shall deliver such Definitive Securities
               to the Persons in whose names such Securities are so registered.

     (e)  Restrictions on Transfer and Exchange of Global Securities.
Notwithstanding any other provisions of this Indenture (other than the
provisions set forth in subsection (f) of this Section 2.06), a Global Security
may not be transferred as a whole except by the Depositary to a nominee of the
Depositary or by a nominee of the Depositary to the Depositary or another

                                      -14-
<PAGE>

nominee of the Depositary or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary.

     (f)  Authentication of Definitive Securities in Absence of Depositary. If
at any time:

          (i)  the Depositary for the Securities notifies the Company that the
               Depositary is unwilling or unable to continue as Depositary for
               the Global Securities and a successor Depositary for the Global
               Securities is not appointed by the Company within 90 days after
               delivery of such notice; or

          (ii) the Company, at its sole discretion, notifies the Trustee in
               writing that it elects to cause the issuance of Definitive
               Securities under this Indenture,

then the Company will execute, and the Trustee will authenticate and deliver
Definitive Securities of the same series as such Global Securities, in an
aggregate principal amount equal to the principal amount of the Global
Securities, in exchange for such Global Securities and registered in such names
as the Depositary shall instruct the Trustee or the Company in writing.

     (g)  Legends.

          (i)  Except as permitted by the following paragraph (ii), each
               Security certificate evidencing the Global Securities and the
               Definitive Securities (and all Securities issued in exchange
               therefor or substitution thereof) shall bear a legend in
               substantially the following form:

     "THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION
EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933 (The
"SECURITIES ACT"), AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR OTHERWISE
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION
THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF
THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5
OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

     THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A)
THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)
INSIDE THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A
QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT)
IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (II) OUTSIDE THE UNITED
STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE
SECURITIES ACT, (III) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE
SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (IV) PURSUANT
TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF
CASES (I)

                                      -15-
<PAGE>

THROUGH (IV) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF
THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS
REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE
RESTRICTIONS REFERRED TO IN (A) ABOVE."

     Each Security certificate evidencing the Global Securities also shall bear
the paragraph referred to in footnote 2 in the form of Security attached hereto
as Exhibit A.

         (ii)  Upon any sale or transfer of a Transfer Restricted Security
               (including any Transfer Restricted Security represented by a
               Global Security) pursuant to Rule 144 under the Securities Act or
               an effective registration statement under the Securities Act:

               (A)  in the case of any Transfer Restricted Security that is a
                    Definitive Security, the Registrar shall permit the Holder
                    thereof to exchange such Transfer Restricted Security for a
                    Definitive Security that does not bear the legend set forth
                    in (i) above and rescind any restriction on the transfer of
                    such Transfer Restricted Security; and

               (B)  in the case of any Transfer Restricted Security represented
                    by a Global Security, such Transfer Restricted Security
                    shall not be required to bear the legend set forth in (i)
                    above if all other interests in such Global Security have
                    been or are concurrently being sold or transferred pursuant
                    to Rule 144 under the Securities Act or pursuant to an
                    effective registration statement under the Securities Act,
                    but such Transfer Restricted Security shall continue to be
                    subject to the provisions of Section 2.06(c) hereof;
                    provided, however, that with respect to any request for an
                    exchange of a Transfer Restricted Security that is
                    represented by a Global Security for a Definitive Security
                    that does not bear a legend set forth in (i) above, which
                    request is made in reliance upon Rule 144 under the
                    Securities Act, the Holder thereof shall certify in writing
                    to the Registrar that such request is being made pursuant to
                    Rule 144 under the Securities Act (such certification to be
                    substantially in the form of Exhibit B hereto).

         (iii) Notwithstanding the foregoing, upon consummation of the Exchange
               Offer, the Company shall issue and, upon receipt of an
               authentication order in accordance with Section 2.02 hereof, the
               Trustee shall authenticate Series B Securities in exchange for
               Series A Securities accepted for exchange in the Exchange Offer,
               which Series B Securities shall not bear the legend set forth in
               (i) above, and the Registrar shall rescind any restriction on the
               transfer of such Securities, in each case unless the Holder of
               such Series A Securities is either (A) a broker-dealer,

                                      -16-
<PAGE>

                 (B) a Person participating in the distribution of the Series A
                 Securities or (C) a Person who is an affiliate (as defined in
                 Rule 144 under the Securities Act) of the Company. The Company
                 shall identify to the Trustee such Holders of the Securities in
                 a written certification signed by an Officer of the Company
                 and, absent certification from the Company to such effect, the
                 Trustee shall assume that there are no such Holders.

     (h)  Cancellation and/or Adjustment of Global Security. At such time as all
beneficial interests in a Global Security have either been exchanged for
Definitive Securities, redeemed, repurchased or canceled, such Global Security
shall be returned to or retained and canceled by the Trustee. At any time prior
to such cancellation, if any beneficial interest in a Global Security is
exchanged for Definitive Securities, redeemed, repurchased or canceled, the
principal amount of Securities represented by such Global Security shall be
reduced and an endorsement shall be made on such Global Security, by the Trustee
or the Security Custodian, at the direction of the Trustee to reflect such
reduction.

     (i)  General Provisions with respect to Transfer and Exchanges.

          (i)    To permit registrations of transfers and exchanges, the Company
                 shall execute and the Trustee shall authenticate Definitive
                 Securities and Global Securities at the Registrar's request.

          (ii)   No service charge shall be made to a Holder for any
                 registration of transfer or exchange (except as otherwise
                 expressly permitted herein), but the Company may require
                 payment of a sum sufficient to cover any transfer tax or
                 similar governmental charge payable in connection therewith
                 (other than such transfer tax or similar governmental charge
                 payable upon exchanges pursuant to Section 8.05 hereof).

          (iii)  The Trustee shall authenticate Definitive Securities and Global
                 Securities in accordance with the provisions of Section 2.02
                 hereof.

          (iv)   Notwithstanding any other provisions of this Indenture to the
                 contrary, the Company shall not be required to register the
                 transfer or exchange of a Security between the record date and
                 the next succeeding Interest Payment Date.

          (v)    Neither the Company nor the Trustee will have any
                 responsibility or liability for any aspect of the records
                 relating to, or payments made on account of, Securities by the
                 Depositary, or for maintaining, supervising or reviewing any
                 records of the Depositary relating to such Securities. Neither
                 the Company nor the Trustee shall be liable for any delay by
                 the related Global Security Holder or the Depositary in
                 identifying the beneficial owners of the related Securities and
                 each such Person may

                                      -17-
<PAGE>

                 conclusively rely on, and shall be protected in relying on,
                 instructions from such Global Security Holder or the Depositary
                 for all purposes (including with respect to the registration
                 and delivery, and the respective principal amounts, of the
                 Securities to be issued).

     SECTION 2.07  Replacement Securities.

     If any mutilated Security is surrendered to the Trustee, or the Company and
the Trustee receive evidence to their satisfaction of the destruction, loss or
theft of any Security, the Company shall issue and the Trustee shall
authenticate a replacement Security if the Trustee's requirements are met. If
required by the Trustee, the Company or any Guarantor, such Holder must furnish
an indemnity bond that is sufficient in the judgment of the Trustee, the Company
and the Guarantors to protect the Company, the Guarantors, the Trustee, any
Agent or any authenticating agent from any loss which any of them may suffer if
a Security is replaced. The Company, the Trustee and the Guarantors may charge
for their expenses in replacing a Security.

     Every replacement Security is an additional obligation of the Company and
the Guarantors.

     SECTION 2.08  Outstanding Securities.

     The Securities outstanding at any time are all the Securities authenticated
by the Trustee except for those canceled by it, those delivered to it for
cancellation, those reductions in the interest in a Global Security effected by
the Trustee hereunder and those described in this Section 2.08 as not
outstanding.

     If a Security is replaced pursuant to Section 2.07 hereof, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Security is held by a bona fide purchaser.

     If the principal amount of any Security is considered paid under Section
3.01 hereof, it ceases to be outstanding and interest on it ceases to accrue.

     A Security does not cease to be outstanding because the Company, a
Guarantor or an Affiliate of any of them holds the Security.

     SECTION 2.09  Treasury Securities.

     In determining whether the Holders of the required principal amount of
Securities have concurred in any direction, waiver or consent, Securities owned
by the Company, any Guarantor or an Affiliate of any of them shall be
disregarded, except that for the purpose of determining whether the Trustee
shall be protected in relying on any such direction, waiver or consent, only
Securities which the Trustee knows are so owned shall be so disregarded.

                                      -18-
<PAGE>

     SECTION 2.10  Temporary Securities.

     Until Definitive Securities are ready for delivery, the Company may prepare
and the Trustee shall authenticate temporary Securities. Temporary Securities
shall be substantially in the form of Definitive Securities, but may have
variations that the Company considers appropriate for temporary Securities.
Without unreasonable delay, the Company shall prepare and the Trustee shall
authenticate definitive Securities in exchange for temporary Securities. Until
so exchanged, the temporary Securities shall in all respects be entitled to the
same benefits under this Indenture as definitive Securities.

     SECTION 2.11  Cancellation.

     The Company or any Guarantor at any time may deliver Securities to the
Trustee for cancellation. The Registrar and the Paying Agent shall forward to
the Trustee any Securities surrendered to them for registration of transfer,
exchange or payment. The Trustee shall cancel all Securities surrendered for
registration of transfer, exchange, payment, replacement or cancellation. Unless
the Company shall direct that canceled Securities be returned to it, after
written notice to the Company all canceled Securities held by the Trustee shall
be disposed of in accordance with the usual disposal procedures of the Trustee,
and the Trustee shall maintain a record of their disposal. The Company may not
issue new Securities to replace Securities that have been paid or that have been
delivered to the Trustee for cancellation.

     SECTION 2.12  Defaulted Interest.

     If the Company defaults in a payment of interest on the Securities, it
shall pay the defaulted interest in any lawful manner plus, to the extent
lawful, interest on the defaulted interest, in each case at the rate provided in
the Securities and in Section 3.01 hereof. The Company may pay the defaulted
interest to the Persons who are Holders on a subsequent special record date. At
least 15 days before any special record date, the Company (or the Trustee, in
the name of and at the expense of the Company) shall mail to Holders a notice
that states the special record date, the related payment date and the amount of
such interest to be paid.

     SECTION 2.13  Persons Deemed Owners.

     The Company, the Trustee, any Agent and any authenticating agent may treat
the Person in whose name any Security is registered as the owner of such
Security for the purpose of receiving payments of principal of or premium, if
any, or interest on such Security and for all other purposes. None of the
Company, the Trustee, any Agent or any authenticating agent shall be affected by
any notice to the contrary.

                                      -19-
<PAGE>

                                   ARTICLE 3

                                   COVENANTS

     SECTION 3.01  Payment of Securities.

     The Company shall pay the principal of and premium, if any, and interest
(including additional interest required by the Registration Rights Agreement
referred to in Section 3.11 hereof) on the Securities on the dates and in the
manner provided in the Securities and in this Indenture. Principal, premium, if
any, and interest shall be considered paid on the date due if the Paying Agent,
other than the Company or a Subsidiary of the Company, holds by 11:00 a.m.,
Eastern time, on that date money deposited by the Company designated for and
sufficient to pay all principal, premium and interest then due. Payments to
Holders of principal, premium, if any, and interest shall be paid by wire
transfer of immediately available funds to the accounts specified by the Holders
thereof or, if no such account is specified, by mailing a check to each such
Holder's registered address.

     The Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue principal, and premium, if any,
at a rate equal to the then applicable interest rate on the Securities to the
extent lawful; and it shall pay interest (including post-petition interest in
any proceeding under any Bankruptcy Law) on overdue installments of interest
(without regard to any applicable grace period) at the same rate to the extent
lawful.

     SECTION 3.02  Maintenance of Office or Agency.

     The Company will maintain, in the Borough of Manhattan, The City of New
York, an office or agency (which may be an office of the Trustee, the Registrar
or the Paying Agent) where Securities may be presented for registration of
transfer or exchange, where Securities may be presented for payment and where
notices and demands to or upon the Company in respect of the Securities and this
Indenture may be served. Unless otherwise designated by the Company by written
notice to the Trustee, such office or agency shall be the principal office of
the Trustee, in The City of New York which, on the date hereof, is located at
101 Barclay Floor 7E, New York, New York 10286. The Company will give prompt
written notice to the Trustee of the location, and any change in the location,
of such office or agency. If at any time the Company shall fail to maintain any
such required office or agency or shall fail to furnish the Trustee with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the Corporate Trust Office of the Trustee.

     The Company may also from time to time designate one or more other offices
or agencies where the Securities may be presented or surrendered for any or all
such purposes and may from time to time rescind such designations; provided,
however, that no such designation or rescission shall in any manner relieve the
Company of its obligation to maintain an office or agency in the Borough of
Manhattan, The City of New York for such purposes. The Company will give prompt
written notice to the Trustee of any such designation or rescission and of any
change in

                                      -20-
<PAGE>

the location of any such other office or agency. The Company hereby designates
the Corporate Trust Office of the Trustee as one such office or agency of the
Company in accordance with Section 2.03 hereof.

     SECTION 3.03  SEC Reports; Financial Statements.

     (a)  The Company shall file with the Trustee, within 15 days after it files
the same with the SEC, copies of the annual reports and the information,
documents and other reports (or copies of such portions of any of the foregoing
as the SEC may by rules and regulations prescribe) that the Company is required
to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act. If the
Company is not subject to the requirements of such Section 13 or 15(d), the
Company shall file with the Trustee, within 15 days after it would have been
required to file the same with the SEC, financial statements, including any
notes thereto (and with respect to annual reports, an auditors' report by a firm
of established national reputation), and a "Management's Discussion and Analysis
of Financial Condition and Results of Operations," both comparable to that which
the Company would have been required to include in such annual reports,
information, documents or other reports if the Company had been subject to the
requirements of such Section 13 or 15(d). The Company shall also comply with the
provisions of TIA Section 314(a).

     (b)  If the Company is required to furnish annual or quarterly reports to
its stockholders pursuant to the Exchange Act, the Company shall cause any
annual report furnished to its stockholders generally and any quarterly or other
financial reports furnished by it to its stockholders generally to be filed with
the Trustee and mailed to the Holders at their addresses appearing in the
register of Securities maintained by the Registrar. If the Company is not
required to furnish annual or quarterly reports to its stockholders pursuant to
the Exchange Act, the Company shall cause its financial statements referred to
in Section 3.03(a) hereof, including any notes thereto (and with respect to
annual reports, an auditors' report by a firm of established national
reputation), and a "Management's Discussion and Analysis of Financial Condition
and Results of Operations" to be so mailed to the Holders within 90 days after
the end of each of the Company's fiscal years and within 60 days after the end
of each of the Company's first three fiscal quarters.

     (c)  For so long as any Transfer Restricted Securities remain outstanding,
the Company shall furnish to all Holders and prospective purchasers of the
Securities designated by the Holders of Transfer Restricted Securities, promptly
upon their request, any information required to be delivered pursuant to Rule
144A(d)(4) under the Securities Act.

     (d)  The Company shall provide the Trustee with a sufficient number of
copies of all reports and other documents and information that the Trustee may
be required to deliver to Holders under this Section 3.03.

                                      -21-
<PAGE>

     SECTION 3.04  Compliance Certificate.

     (a)  The Company shall deliver to the Trustee, within 120 days after the
end of each fiscal year of the Company, a statement signed by two Officers of
the Company, which need not constitute an Officers' Certificate, complying with
TIA Section 314(a)(4) and stating that in the course of performance by the
signing Officers of the Company of their duties as such Officers of the Company
they would normally obtain knowledge of the keeping, observing, performing and
fulfilling by the Company of its obligations under this Indenture, and further
stating, as to each such Officer signing such statement, that to the best of his
knowledge the Company and each Guarantor has kept, observed, performed and
fulfilled each and every covenant contained in this Indenture and is not in
default in the performance or observance of any of the terms, provisions and
conditions hereof (or, if a Default or Event of Default shall have occurred,
describing all such Defaults or Events of Default of which such Officer may have
knowledge and what action the Company or such Guarantor, as the case may be, is
taking or proposes to take with respect thereto).

     (b)  The Company and the Guarantors shall, so long as any of the Securities
are outstanding, deliver to the Trustee, forthwith upon any Officer of the
Company or any Guarantor becoming aware of any Default or Event of Default under
this Indenture, an Officers' Certificate specifying such Default or Event of
Default and what action the Company or such Guarantor is taking or proposes to
take with respect thereto.

     SECTION 3.05  Corporate Existence.

     Subject to Article 4 hereof, the Company shall do or cause to be done all
things necessary to preserve and keep in full force and effect its corporate
existence and the corporate, partnership and other existence of each of its
Subsidiaries and all rights (charter and statutory) and franchises of the
Company and its Subsidiaries, provided that the Company shall not be required to
preserve the corporate, partnership or limited liability company existence of
any Subsidiary of the Company or any such right or franchise if the Board of
Directors shall determine that the preservation thereof is no longer desirable
in the conduct of the business of the Company and its Subsidiaries taken as a
whole and that the loss thereof would not have a material adverse effect on the
business, prospects, assets or financial condition of the Company and its
Subsidiaries taken as a whole and would not have any material adverse effect on
the payment and performance of the obligations of the Company and the Guarantors
under the Securities and this Indenture.

     SECTION 3.06  Maintenance of Properties.

     The Company shall cause all material properties owned by or leased to the
Company or any Subsidiary of the Company or used or held for use in the conduct
of its business or the business of any such Subsidiary to be maintained and kept
in good condition, repair and working order (reasonable wear and tear excepted)
and will cause to be made all necessary repairs, renewals, replacements,
betterments and improvements thereof, all as in the judgment of the

                                      -22-
<PAGE>

Company may be necessary so that the business carried on in connection therewith
may be properly conducted at all times; provided that nothing in this Section
3.06 shall prevent the Company from discontinuing the operation or maintenance
of any of such properties if such discontinuance is, in the judgment of the
Company, desirable in the conduct of its business or the business of any such
Subsidiary and not disadvantageous in any material respect to the Holders.

     SECTION 3.07  Payment of Taxes and Other Claims.

     The Company will pay or discharge or cause to be paid or discharged, before
the same shall become delinquent, (i) all material taxes, assessments and
governmental charges levied or imposed upon the Company or any of its
Subsidiaries or upon the income, profits or property of the Company or any of
its Subsidiaries, and (ii) all material lawful claims for labor, materials and
supplies which, if unpaid, might by law become a Lien upon the property of the
Company or any of its Subsidiaries; provided that the Company shall not be
required to pay or discharge or cause to be paid or discharged any such tax,
assessment, charge or claim whose amount, applicability or validity is being
contested in good faith, and, if necessary, by appropriate proceedings.

     SECTION 3.08  Waiver of Stay, Extension or Usury Laws.

     The Company and each Guarantor covenant (to the extent that they may
lawfully do so) that they will not at any time insist upon, or plead, or in any
manner whatsoever claim or take the benefit or advantage of, any stay or
extension law or any usury law or other law, which would prohibit or forgive the
Company or any Guarantor from paying all or any portion of the principal of, or
premium, if any, or interest on the Securities as contemplated herein, wherever
enacted, now or at any time hereafter in force, or which may affect the
covenants or the performance of this Indenture; and (to the extent that they may
lawfully do so) the Company and each Guarantor hereby expressly waive all
benefit or advantage of any such law, and covenant that they will not hinder,
delay or impede the execution of any power herein granted to the Trustee, but
will suffer and permit the execution of every such power as though no such law
had been enacted.

     SECTION 3.09  Limitation on Sale/Leaseback Transactions.

     The Company shall not, and shall not permit any Subsidiary of the Company
to, enter into any Sale/Leaseback Transaction with any Person (other than the
Company or a Subsidiary of the Company) unless:

     (a)  the Company or such Subsidiary would be entitled to incur
Indebtedness, in a principal amount equal to the Attributable Indebtedness with
respect to such Sale/Leaseback Transaction, secured by a Lien on the property
subject to such Sale/Leaseback Transaction pursuant to Section 3.10 hereof
without equally and ratably securing the Securities pursuant to such Section;

     (b)  after the Issue Date and within a period commencing six months prior
to the consummation of such Sale/Leaseback Transaction and ending six months
after the consummation thereof, the Company or such Subsidiary shall have
expended for property used

                                      -23-
<PAGE>

or to be used in the ordinary course of business of the Company and its
Subsidiaries an amount equal to all or a portion of the Net Proceeds of such
Sale/Leaseback Transaction and the Company shall have elected to designate such
amount as a credit against such Sale/Leaseback Transaction (with any such amount
not being so designated to be applied as set forth in clause (c) below); or

     (c)  the Company, during the 12-month period after the effective date of
such Sale/Leaseback Transaction, shall have applied to the voluntary defeasance
or retirement of Securities or any Pari Passu Indebtedness an amount equal to
the greater of the Net Proceeds of the sale or transfer of the property leased
in such Sale/Leaseback Transaction and the fair value, as determined by the
Board of Directors, of such property at the time of entering into such
Sale/Leaseback Transaction (in either case adjusted to reflect the remaining
term of the lease and any amount expended by the Company as set forth in clause
(b) above), less an amount equal to the principal amount of Securities and Pari
Passu Indebtedness voluntarily defeased or retired by the Company within such
12-month period and not designated as a credit against any other Sale/Leaseback
Transaction entered into by the Company or any Subsidiary of the Company during
such period.

     SECTION 3.10  Limitation on Liens.

     The Company shall not, and shall not permit any Subsidiary of the Company
to, issue, assume or guarantee any Indebtedness for borrowed money secured by
any Lien on any property or asset now owned or hereafter acquired by the Company
or such Subsidiary without making effective provision whereby any and all
Securities then or thereafter outstanding will be secured by a Lien equally and
ratably with any and all other obligations thereby secured for so long as any
such obligations shall be so secured. Notwithstanding the foregoing, the Company
or any Subsidiary of the Company may, without so securing the Securities, issue,
assume or guarantee Indebtedness for borrowed money secured by the following
Liens:

     (a)  Liens existing on the Issue Date or provided for under the terms of
agreements existing on the Issue Date (including, without limitation, the Lien
provided for pursuant to Section 6.07 hereof), excluding any Liens arising under
the Bank Credit Facility;

     (b)  Liens on property securing (i) all or any portion of the cost of
acquiring, constructing, altering, improving or repairing any property or
assets, real or personal, or improvements used or to be used in connection with
such property or (ii) Indebtedness incurred by the Company or any Subsidiary of
the Company prior to or within one year after the later of the acquisition, the
completion of construction, alteration, improvement or repair or the
commencement of commercial operation thereof, which Indebtedness is incurred for
the purpose of financing all or any part of the purchase price thereof or
construction or improvements thereon;

     (c)  Liens securing Indebtedness owed by a Subsidiary of the Company to the
Company or to any other Subsidiary of the Company;

                                      -24-
<PAGE>

     (d)  Liens on the property of any Person existing at the time such Person
becomes a Subsidiary of the Company and not incurred as a result of (or in
connection with or in anticipation of) such Person becoming a Subsidiary of the
Company, provided that such Liens do not extend to or cover any property or
assets of the Company or any of its Subsidiaries other than the property
encumbered at the time such Person becomes a Subsidiary of the Company and do
not secure Indebtedness with a principal amount in excess of the principal
amount outstanding at such time;

     (e)  Liens on any property securing (i) Indebtedness incurred in connection
with the construction, installation or financing of pollution control or
abatement facilities or other forms of industrial revenue bond financing or (ii)
Indebtedness issued or guaranteed by the United States or any State thereof or
any department, agency or instrumentality of either;

     (f)  any Lien extending, renewing or replacing (or successive extensions,
renewals or replacements of) any Lien of any type permitted under clause (a),
(b), (d) or (e) above, provided that such Lien extends to or covers only the
property that is subject to the Lien being extended, renewed or replaced and
that the principal amount of the Indebtedness secured thereby shall not exceed
the principal amount of Indebtedness so secured at the time of such extension,
renewal or replacement; or

     (g)  Liens (exclusive of any Lien of any type otherwise permitted under
clauses (a) through (f) above) securing Indebtedness for borrowed money of the
Company or any Subsidiary of the Company in an aggregate principal amount which,
together with the aggregate amount of Attributable Indebtedness deemed to be
outstanding in respect of all Sale/Leaseback Transactions entered into pursuant
to clause (a) of Section 3.09 hereof (exclusive of any such Sale/Leaseback
Transactions otherwise permitted under clauses (a) through (f) above), does not
at the time such Indebtedness is incurred exceed 10% of the Consolidated Net
Worth of the Company (as shown in the most recent audited consolidated balance
sheet of the Company and its Subsidiaries).

     SECTION 3.11  Registration Rights Agreement.

     The Company shall perform its obligations under the Registration Rights
Agreement and shall comply in all material respects with the terms and
conditions contained therein including, without limitation, the payment of
additional interest (as described in Section 6 of the Registration Rights
Agreement).

                                      -25-
<PAGE>

                                   ARTICLE 4

                                  SUCCESSORS

     SECTION 4.01  Limitations on Mergers and Consolidations.

     Neither the Company nor any Guarantor (other than any Guarantor that has
been released from its Guarantee pursuant to the provisions of Section 9.06
hereof) shall consolidate with or merge into any Person, or sell, lease, convey,
transfer or otherwise dispose of all or substantially all of its assets to any
Person, unless:

          (i)   the Person formed by or surviving such consolidation or merger
                (if other than the Company or such Guarantor, as the case may
                be), or to which such sale, lease, conveyance, transfer or other
                disposition shall be made (collectively, the "Successor"), is a
                corporation, partnership or limited liability company organized
                and existing under the laws of the United States or any State
                thereof or the District of Columbia (or, alternatively, in the
                case of a Guarantor organized under the laws of a jurisdiction
                outside the United States, a corporation, partnership or limited
                liability company organized and existing under the laws of such
                foreign jurisdiction), and the Successor assumes by supplemental
                indenture in a form satisfactory to the Trustee all of the
                obligations of the Company or such Guarantor, as the case may
                be, under this Indenture and the Securities;

          (ii)  immediately after giving effect to such transaction, no Default
                or Event of Default shall have occurred and be continuing; and

          (iii) the Company shall have delivered to the Trustee an Officers'
                Certificate and an Opinion of Counsel, each stating that the
                transaction and such supplemental indenture comply with this
                Indenture.

     SECTION 4.02  Successor Corporation Substituted.

     Upon any consolidation or merger of the Company or any Guarantor, or any
sale, lease, conveyance, transfer or other disposition of all or substantially
all of the assets of the Company or any Guarantor in accordance with Section
4.01 hereof, the Successor formed by such consolidation or into or with which
the Company or such Guarantor is merged or to which such sale, lease,
conveyance, transfer or other disposition or assignment is made shall succeed
to, and be substituted for, and may exercise every right and power of, the
Company or such Guarantor, as the case may be, under this Indenture and the
Securities with the same effect as if such Successor had been named as the
Company or such Guarantor herein and the predecessor Company or Guarantor, in
the case of a sale, conveyance, transfer or other disposition, shall be released
from all obligations under this Indenture and the Securities.

                                      -26-
<PAGE>

                                   ARTICLE 5

                             DEFAULTS AND REMEDIES

     SECTION 5.01  Events of Default.

     An "Event of Default" occurs if:

          (1)  the Company or any Guarantor defaults in the payment of interest
     on any Security when the same becomes due and payable and such default
     continues for a period of 30 days;

          (2)  the Company or any Guarantor defaults in the payment of the
     principal of or premium, if any, on any Security when the same becomes due
     and payable at maturity, upon acceleration, upon redemption or otherwise;

          (3)  the Company or any Guarantor fails to comply with any of its
     other agreements or covenants in, or provisions of, the Securities, the
     Guarantees or this Indenture and such failure continues for the period and
     after the notice specified in the last paragraph of this Section 5.01;

          (4)  any default shall occur which results in the acceleration of the
     maturity of any Indebtedness of the Company or any Subsidiary of the
     Company (other than the Securities or any Non-Recourse Indebtedness) having
     an outstanding principal amount of $10 million or more individually or,
     taken together with all other such Indebtedness that has been so
     accelerated, in the aggregate; or any default shall occur in the payment of
     any principal or interest in respect of any Indebtedness of the Company or
     any Subsidiary of the Company (other than the Securities or any Non-
     Recourse Indebtedness) having an outstanding principal amount of $10
     million or more individually or, taken together with all other such
     Indebtedness with respect to which any such payment has not been made, in
     the aggregate and such default shall be continuing for a period of 30 days
     without the Company or such Subsidiary, as the case may be, effecting a
     cure of such default;

          (5)  a final, non-appealable judgment or order for the payment of
     money in excess of $10 million (net of applicable insurance coverage) shall
     be rendered against the Company, any Guarantor or any other "significant
     subsidiary" (as such term is defined in Regulation S-X under the Exchange
     Act; a "Significant Subsidiary") of the Company and such judgment or order
     shall continue unsatisfied and unstayed for a period of 30 days;

          (6)  the Company, any Guarantor or any other Significant Subsidiary of
     the Company pursuant to or within the meaning of any Bankruptcy Law:

               (A)  commences a voluntary case,

                                      -27-
<PAGE>

               (B)  consents to the entry of an order for relief against it in
                    an involuntary case,

               (C)  consents to the appointment of a Custodian of it or for all
                    or for a substantial part of its property, or

               (D)  makes a general assignment for the benefit of its creditors;
                    or

          (7)  a court of competent jurisdiction enters an order or decree under
     any Bankruptcy Law that remains unstayed and in effect for 60 days and
     that:

               (A)  is for relief against the Company, any Guarantor or any
                    other Significant Subsidiary of the Company as debtor in an
                    involuntary case,

               (B)  appoints a Custodian of the Company, any Guarantor or any
                    other Significant Subsidiary of the Company or a Custodian
                    for all or for a substantial part of the property of the
                    Company, any Guarantor or any other Significant Subsidiary
                    of the Company, or

               (C)  orders the liquidation of the Company, any Guarantor or any
                    other Significant Subsidiary of the Company.

     The term "Custodian" means any receiver, trustee, assignee, liquidator or
similar official under any Bankruptcy Law.

     The Trustee shall not be deemed to know of a Default unless a Trust Officer
at the Corporate Trust Office of the Trustee has actual knowledge of such
Default or the Trustee receives written notice at the Corporate Trust Office of
the Trustee of such Default with specific reference to such Default.

     When a Default is cured, it ceases.

     A Default under clause (3) of this Section is not an Event of Default until
the Trustee notifies the Company and, in the case of a Default by a Guarantor,
such Guarantor, or the Holders of at least 25% in principal amount of the then
outstanding Securities notify the Company, such Guarantor (where applicable) and
the Trustee, of the Default, and neither the Company nor such Guarantor cures
the Default within 60 days after receipt of the notice. The notice must specify
the Default, demand that it be remedied and state that the notice is a "Notice
of Default."

     SECTION 5.02  Acceleration.

     If an Event of Default (other than an Event of Default specified in clause
(6) or (7) of Section 5.01 hereof with respect to the Company or any Guarantor)
occurs and is continuing, the

                                      -28-
<PAGE>

Trustee by notice to the Company, or the Holders of at least 25% in principal
amount of the then outstanding Securities by notice to the Company and the
Trustee, may declare the principal of and premium, if any, and accrued and
unpaid interest on all then outstanding Securities to be due and payable
immediately. Upon any such declaration the amounts due and payable on the
Securities, as determined in accordance with the next succeeding paragraph,
shall be due and payable immediately. If an Event of Default specified in clause
(6) or (7) of Section 5.01 hereof with respect to the Company or any Guarantor
occurs, such amounts shall ipso facto become and be immediately due and payable
without any declaration, notice or other act on the part of the Trustee or any
Holder. The Holders of a majority in principal amount of the then outstanding
Securities by written notice to the Trustee may rescind an acceleration and its
consequences (other than nonpayment of principal of, or premium, if any, or
interest on the Securities) if the rescission would not conflict with any
judgment or decree and if all existing Events of Default have been cured or
waived, except nonpayment of principal, or premium, if any, or interest that has
become due solely because of the acceleration.

     In the event that the maturity of the Securities is accelerated pursuant to
this Section 5.02, 100% of the principal amount thereof shall become due and
payable plus, premium, if any, and accrued interest to the date of payment.

     SECTION 5.03  Other Remedies.

     If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy to collect the payment of principal of, or premium, if any, or
interest on the Securities or to enforce the performance of any provision of the
Securities, this Indenture or the Registration Rights Agreement.

     The Trustee may maintain a proceeding even if it does not possess any of
the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder in exercising any right or remedy accruing
upon an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. All remedies are cumulative
to the extent permitted by law.

     SECTION 5.04  Waiver of Existing Defaults.

     Subject to Sections 5.07 and 8.02 hereof, the Holders of a majority in
principal amount of the then outstanding Securities by notice to the Trustee may
waive an existing Default or Event of Default and its consequences (including
waivers obtained in connection with a tender offer or exchange offer for
Securities or a solicitation of consents in respect of Securities, provided that
in each case such offer or solicitation is made to all Holders of then
outstanding Securities on equal terms), except (1) a continuing Default or Event
of Default in the payment of the principal of, or premium, if any, or interest
on any Security or (2) a continued Default in respect of a provision that under
Section 8.02 hereof cannot be amended without the consent of each Holder
affected. Upon any such waiver, such Default shall cease to exist, and any Event
of Default arising

                                      -29-
<PAGE>

therefrom shall be deemed to have been cured for every purpose of this
Indenture; but no such waiver shall extend to any subsequent or other Default or
impair any right consequent thereon.

     SECTION 5.05  Control by Majority.

     The Holders of a majority in principal amount of the then outstanding
Securities may direct the time, method and place of conducting any proceeding
for any remedy available to the Trustee or exercising any trust or power
conferred on it hereunder. However, the Trustee may refuse to follow any
direction that conflicts with applicable law or this Indenture, that the Trustee
determines may be unduly prejudicial to the rights of other Holders, or that may
involve the Trustee in personal liability; provided, however, that the Trustee
may take any other action deemed proper by the Trustee that is not inconsistent
with such direction. Prior to taking any action hereunder, the Trustee shall be
entitled to indemnification satisfactory to it in its sole discretion against
all losses and expenses caused by taking or not taking such action.

     SECTION 5.06  Limitations on Suits.

     Subject to Section 5.07 hereof, a Holder may pursue a remedy with respect
to this Indenture (including the Guarantees) or the Securities only if:

          (1)  the Holder gives to the Trustee written notice of a continuing
     Event of Default;

          (2)  the Holders of at least 25% in principal amount of the then
     outstanding Securities make a written request to the Trustee to pursue the
     remedy;

          (3)  such Holder or Holders offer to the Trustee indemnity reasonably
     satisfactory to the Trustee against any loss, liability or expense;

          (4)  the Trustee does not comply with the request within 60 days after
     receipt of the request and the offer of indemnity; and

          (5)  during such 60-day period the Holders of a majority in principal
     amount of the Securities do not give the Trustee a direction inconsistent
     with the request.

     A Holder may not use this Indenture to prejudice the rights of another
Holder or to obtain a preference or priority over another Holder.

     SECTION 5.07  Rights of Holders to Receive Payment.

     Notwithstanding any other provision of this Indenture, the right of any
Holder of a Security to receive payment of principal of, and premium, if any,
and interest on the Security, on or after the respective due dates expressed in
the Security, or to bring suit for the enforcement of any such payment on or
after such respective dates, is absolute and unconditional and shall not be
impaired or affected without the consent of the Holder.

                                      -30-
<PAGE>

     SECTION 5.08  Collection Suit by Trustee.

     If an Event of Default specified in clause (1) or (2) of Section 5.01
hereof occurs and is continuing, the Trustee is authorized to recover judgment
in its own name and as trustee of an express trust against the Company and any
Guarantor for the amount of principal and premium, if any, and interest
remaining unpaid on the Securities, and interest on overdue principal and
premium, if any, and, to the extent lawful, interest on overdue interest, and
such further amount as shall be sufficient to cover the costs and expenses of
collection, including the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel.

     SECTION 5.09  Trustee May File Proofs of Claim.

     The Trustee is authorized to file such proofs of claim and other papers or
documents and to take such actions, including participating as a member, voting
or otherwise, of any committee of creditors, as may be necessary or advisable in
order to have the claims of the Trustee (including any claim for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel) and the Holders allowed in any judicial proceedings relative to the
Company and any Guarantor or their respective creditors or properties and shall
be entitled and empowered to collect, receive and distribute any money or other
property payable or deliverable on any such claims and any Custodian in any such
judicial proceeding is hereby authorized by each Holder to make such payments to
the Trustee, and in the event that the Trustee shall consent to the making of
such payments directly to the Holders, to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 6.07 hereof. To the extent that the payment of any such compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel, and
any other amounts due the Trustee under Section 6.07 hereof out of the estate in
any such proceeding, shall be denied for any reason, payment of the same shall
be secured by a Lien on, and shall be paid out of, any and all distributions,
dividends, money, securities and other properties which the Holders of the
Securities may be entitled to receive in such proceeding whether in liquidation
or under any plan of reorganization or arrangement or otherwise. Nothing herein
contained shall be deemed to authorize the Trustee to authorize or consent to or
accept or adopt on behalf of any Holder any plan of reorganization, arrangement,
adjustment or composition affecting the Securities or the rights of any Holder
thereof, or to authorize the Trustee to vote in respect of the claim of any
Holder in any such proceeding.

     SECTION 5.10  Priorities.

     If the Trustee collects any money pursuant to this Article, it shall pay
out the money in the following order:

     First: to the Trustee for amounts due under Section 6.07 hereof;

                                      -31-
<PAGE>

     Second: to Holders for amounts due and unpaid on the Securities for
principal, premium, if any, and interest ratably, without preference or priority
of any kind, according to the amounts due and payable on the Securities for
principal, premium, if any, and interest, respectively; and

     Third: to the Company.

     The Trustee, upon prior written notice to the Company, may fix a record
date and payment date for any payment to Holders pursuant to this Article.

     SECTION 5.11 Undertaking for Costs.

     In any suit for the enforcement of any right or remedy under this Indenture
or in any suit against the Trustee for any action taken or omitted by it as a
trustee, a court in its discretion may require the filing by any party litigant
in the suit of an undertaking to pay the costs of the suit, and the court in its
discretion may assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant. This Section does
not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 5.07
hereof, or a suit by a Holder or Holders of more than 10% in principal amount of
the then outstanding Securities.

                                   ARTICLE 6

                                    TRUSTEE

     SECTION 6.01 Duties of Trustee.

     (a)    If an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture, and
use the same degree of care and skill in such exercise, as a prudent man would
exercise or use under the circumstances in the conduct of his own affairs.

     (b)    Except during the continuance of an Event of Default:

            (1)    the Trustee need perform only those duties that are
     specifically set forth in this Indenture and no others, and no implied
     covenants or obligations shall be read into this Indenture against the
     Trustee; and

            (2)    in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon certificates or opinions furnished to
     the Trustee and conforming to the requirements of this Indenture. However,
     the Trustee shall examine such certificates and opinions to determine
     whether or not, on their face, they appear to conform to the requirements
     of this Indenture.

                                     -32-
<PAGE>

     (c)  The Trustee may not be relieved from liabilities for its own negligent
action, its own negligent failure to act, or its own willful misconduct, except
that:

          (1) this paragraph does not limit the effect of paragraph (b) of this
     Section;

          (2) the Trustee shall not be liable for any error of judgment made in
     good faith by a Trust Officer, unless it is proved that the Trustee was
     negligent in ascertaining the pertinent facts; and

          (3) the Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 5.05 hereof.

     (d)  Whether or not therein expressly so provided, every provision of this
Indenture that in any way relates to the Trustee is subject to paragraphs (a),
(b) and (c) of this Section.

     (e)  No provision of this Indenture shall require the Trustee to expend or
risk its own funds or incur any liability. The Trustee may refuse to perform any
duty or exercise any right or power unless it receives indemnity reasonably
satisfactory to it against any loss, liability or expense.

     (f)  The Trustee shall not be liable for interest on any money received by
it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law. All money received by the Trustee shall, until applied
as herein provided, be held in trust for the payment of the principal of, and
premium if any, and interest on the Securities.

     SECTION 6.02 Rights of Trustee.

     (a)  The Trustee may rely on any document believed by it to be genuine and
to have been signed or presented by the proper Person. The Trustee need not
investigate any fact or matter stated in the document.

     (b)  Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel or both. The Trustee shall not be
liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel. The Trustee may consult with
counsel and the written advice of such counsel or any Opinion of Counsel shall
be full and complete authorization and protection in respect of any action
taken, suffered or omitted by it hereunder in good faith and in reliance
thereon.

     (c)  The Trustee may act through agents and shall not be responsible for
the misconduct or negligence of any agent appointed with due care.

                                     -33-
<PAGE>

     (d)  The Trustee shall not be liable for any action it takes or omits to
take in good faith which it believes to be authorized or within its rights or
powers conferred upon it by this Indenture.

     (e)  Unless otherwise specifically provided in this Indenture, any demand,
request, direction or notice from the Company or any Guarantor shall be
sufficient if signed by an Officer of the Company or such Guarantor.

     SECTION 6.03 Individual Rights of Trustee.

     The Trustee in its individual or any other capacity may become the owner or
pledgee of Securities and may otherwise deal with the Company, the Guarantors or
any of their Affiliates with the same rights it would have if it were not
Trustee. Any Agent may do the same with like rights. However, the Trustee is
subject to Sections 6.10 and 6.11 hereof.

     SECTION 6.04 Trustee's Disclaimer.

     The Trustee makes no representation as to the validity or adequacy of this
Indenture or the Securities, it shall not be accountable for the Company's use
of the proceeds from the Securities or any money paid to the Company or upon the
Company's direction under any provision hereof, it shall not be responsible for
the use or application of any money received by any Paying Agent other than the
Trustee and it shall not be responsible for any statement or recital herein or
any statement in the Securities other than its certificate of authentication.

     SECTION 6.05 Notice of Defaults.

     If a Default or Event of Default occurs and is continuing and it is known
to the Trustee, the Trustee shall mail to Holders a notice of the Default or
Event of Default within 90 days after it occurs. Except in the case of a Default
or Event of Default in payment of principal of, or premium, if any, or interest
on any Security, the Trustee may withhold the notice if and so long as a
committee of its Trust Officers in good faith determines that withholding the
notice is in the interests of Holders.

     SECTION 6.06 Reports by Trustee to Holders.

     Within 60 days after each January 31, beginning with January 31, 2002, and
in any event prior to March 31 in each year, the Trustee shall mail to Holders a
brief report dated as of such reporting date that complies with TIA Section
313(a); provided, however, that if no event described in TIA Section 313(a) has
occurred within the twelve months preceding the reporting date, no report need
be transmitted. The Trustee also shall comply with TIA Section 313(b). The
Trustee shall also transmit by mail all reports as required by TIA Sections
313(c) and 313(d).

                                     -34-
<PAGE>

     A copy of each report at the time of its mailing to Holders shall be filed
with the SEC and each securities exchange, if any, on which the Securities are
listed. The Company shall notify the Trustee if and when the Securities are
listed on any stock exchange.

     SECTION 6.07 Compensation and Indemnity.

     The Company and the Guarantors jointly and severally agree to pay to the
Trustee from time to time reasonable compensation for its acceptance of this
Indenture and services hereunder. The Trustee's compensation shall not be
limited by any law on compensation of a trustee of an express trust. The Company
and the Guarantors jointly and severally agree to reimburse the Trustee upon
request for all reasonable disbursements, advances and expenses incurred by it.
Such expenses shall include the reasonable compensation, disbursements and
expenses of the Trustee's agents and counsel.

     The Company and the Guarantors jointly and severally agree to indemnify the
Trustee against any loss, liability or expense incurred by it arising out of or
in connection with the acceptance or administration of its duties under this
Indenture, except as set forth in the next paragraph. The Trustee shall notify
the Company and the Guarantors promptly of any claim for which it may seek
indemnity. The Company shall defend the claim and the Trustee shall cooperate in
the defense. The Trustee may have separate counsel and the Company and the
Guarantors shall pay the reasonable fees and expenses of such counsel. The
Company need not pay for any settlement made without its consent.

     Neither the Company nor the Guarantors shall be obligated to reimburse any
expense or indemnify against any loss or liability incurred by the Trustee
through negligence or bad faith.

     To secure the payment obligations of the Company and the Guarantors in this
Section 6.07, the Trustee shall have a Lien prior to the Securities on all money
or property held or collected by the Trustee, except that held in trust to pay
principal of, and premium, if any, and interest on the Securities. Such Lien
shall survive the satisfaction and discharge of this Indenture.

     When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 5.01(6) or (7) hereof occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

     SECTION 6.08 Replacement of Trustee.

     A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 6.08.

     The Trustee may resign and be discharged from the trust hereby created by
so notifying the Company and the Guarantors. The Holders of a majority in
principal amount of the then

                                     -35-
<PAGE>

outstanding Securities may remove the Trustee by so notifying the Trustee and
the Company. The Company may remove the Trustee if:

          (1)  the Trustee fails to comply with Section 6.10 hereof;

          (2)  the Trustee is adjudged a bankrupt or an insolvent or an order
     for relief is entered with respect to the Trustee under any Bankruptcy Law;

          (3)  a Custodian or public officer takes charge of the Trustee or its
     property; or

          (4)  the Trustee otherwise becomes incapable of acting.

     If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company and the Guarantors shall promptly appoint
a successor Trustee. Within one year after the successor Trustee takes office,
the Holders of a majority in principal amount of the Securities may appoint a
successor Trustee to replace the successor Trustee appointed by the Company.

     If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of at least 10% in principal amount of the then outstanding Securities
may petition any court of competent jurisdiction for the appointment of a
successor Trustee.

     If the Trustee fails to comply with Section 6.10 hereof, any Holder may
petition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

     A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company and the Guarantors. Thereupon the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders. The retiring Trustee shall promptly transfer all property
held by it as Trustee to the successor Trustee, subject to the Lien provided for
in Section 6.07 hereof. Notwithstanding replacement of the Trustee pursuant to
this Section 6.08 hereof, the obligations of the Company and the Guarantors
under Section 6.07 hereof shall continue for the benefit of the retiring
Trustee.

     SECTION 6.09 Successor Trustee by Merger, etc.

     Subject to Section 6.10 hereof, if the Trustee consolidates, merges or
converts into, or transfers all or substantially all of its corporate trust
business to, another corporation, the successor corporation without any further
act shall be the successor Trustee; provided, however, that in the case of a
transfer of all or substantially all of its corporate trust business to another
corporation, the transferee corporation expressly assumes all of the Trustee's
liabilities hereunder.

                                     -36-
<PAGE>

     In case any Securities shall have been authenticated, but not delivered, by
the Trustee then in office, any successor by merger, conversion or consolidation
to such authenticating Trustee may adopt such authentication and deliver the
Securities so authenticated; and in case at that time any of the Securities
shall not have been authenticated, any successor to the Trustee may authenticate
such Securities either in the name of any predecessor hereunder or in the name
of the successor to the Trustee; and in all such cases such certificates shall
have the full force which it is anywhere in the Securities or in this Indenture
provided that the certificate of the Trustee shall have.

     SECTION 6.10 Eligibility; Disqualification.

     There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States of
America, any State thereof or the District of Columbia and authorized under such
laws to exercise corporate trust power, shall be subject to supervision or
examination by Federal or State (or the District of Columbia) authority and
shall have, or be a Subsidiary of a bank or bank holding company having, a
combined capital and surplus of at least $50 million as set forth in its most
recent published annual report of condition.

     The Indenture shall always have a Trustee who satisfies the requirements of
TIA Sections 310(a)(1), 310(a)(2) and 310(a)(5). The Trustee is subject to and
shall comply with the provisions of TIA Section 310(b) during the period of time
required by this Indenture. Nothing in this Indenture shall prevent the Trustee
from filing with the SEC the application referred to in the penultimate
paragraph of TIA Section 310(b).

     SECTION 6.11 Preferential Collection of Claims Against Company.

     The Trustee is subject to and shall comply with the provisions of TIA
Section 311(a), excluding any creditor relationship listed in TIA Section
311(b). A Trustee who has resigned or been removed shall be subject to TIA
Section 311(a) to the extent indicated therein.

                                   ARTICLE 7

                            DISCHARGE OF INDENTURE

     SECTION 7.01 Termination of Company's Obligations.

     (a)   This Indenture shall cease to be of further effect (except that the
Company's and the Guarantors' obligations under Section 6.07 hereof and the
Trustee's and Paying Agent's obligations under Section 7.03 hereof shall
survive), and the Trustee, on demand of the Company, shall execute proper
instruments acknowledging the satisfaction and discharge of this Indenture,
when:

          (1)  either

                                     -37-
<PAGE>

               (A)  all outstanding Securities theretofore authenticated and
                    issued (other than destroyed, lost or stolen Securities that
                    have been replaced or paid) have been delivered to the
                    Trustee for cancellation; or

               (B)  all outstanding Securities not theretofore delivered to the
                    Trustee for cancellation:

                    (i)  have become due and payable, or

                    (ii) will become due and payable at their stated maturity
                         within one year,

     and the Company, in the case of clause (i) or (ii) above, has deposited or
     caused to be deposited with the Trustee as funds (immediately available to
     the Holders in the case of clause (i)) in trust for such purpose an amount
     which, together with earnings thereon, will be sufficient to pay and
     discharge the entire indebtedness on such Securities for principal,
     premium, if any, and interest to the date of such deposit (in the case of
     Securities which have become due and payable) or to the stated maturity, as
     the case may be;

          (2) the Company has paid all other sums payable by it hereunder; and

          (3) the Company has delivered to the Trustee an Officers' Certificate
     stating that all conditions precedent to satisfaction and discharge of this
     Indenture have been complied with, together with an Opinion of Counsel to
     the same effect.

     (b) The Company and the Guarantors may, subject as provided herein,
terminate all of their obligations under this Indenture if:

         (1)   the Company has irrevocably deposited or caused to be irrevocably
     deposited with the Trustee as trust funds in trust for the purpose of
     making the following payments, specifically pledged as security for and
     dedicated solely to the benefit of the Holders, (i) cash in an amount, or
     (ii) U.S. Government Obligations, maturing as to principal and interest at
     such times and in such amounts as will insure the availability of cash in
     an amount or (iii) a combination thereof, sufficient, in the opinion of a
     nationally recognized firm of independent public accountants expressed in a
     written certification thereof delivered to the Trustee, to pay, without
     consideration of the reinvestment of any such amounts and after payment of
     all taxes or other charges or assessments in respect thereof payable by the
     Trustee, the principal of, and premium, if any, and interest on all
     Securities on each date that such principal, premium, if any, or interest
     is due and payable and to pay all other sums payable by it hereunder;
     provided that the Trustee shall have been irrevocably instructed to apply
     such money and/or the proceeds of such U.S. Government Obligations to the
     payment of said principal, premium, if any, and interest with respect to
     the Securities as the same shall become due;

                                     -38-
<PAGE>

          (2)  the Company has delivered to the Trustee an Officers' Certificate
     stating that all conditions precedent to satisfaction and discharge of this
     Indenture have been complied with, and an Opinion of Counsel to the same
     effect;

          (3)  no Default or Event of Default shall have occurred and be
     continuing on the date of such deposit or, insofar as clauses (6) and (7)
     of Section 5.01 hereof are concerned, at any time during the period ending
     on the 91st day after the date of such deposit (it being understood that
     this condition shall not be deemed satisfied until the expiration of such
     period);

          (4)  the Company shall have delivered to the Trustee an Opinion of
     Counsel from a nationally recognized counsel acceptable to the Trustee or a
     tax ruling to the effect that the Holders will not recognize income, gain
     or loss for Federal income tax purposes as a result of the Company's
     exercise of its option under this Section 7.01(b) and will be subject to
     Federal income tax on the same amount and in the same manner and at the
     same times as would have been the case if such option had not been
     exercised;

          (5)  such deposit and discharge will not result in a breach or
     violation of, or constitute a default under, any other agreement or
     instrument to which the Company is a party or by which it is bound;

          (6)  such deposit and discharge shall not cause the Trustee to have a
     conflicting interest as defined in TIA Section 310(b); and

          (7)  the Company shall have delivered to the Trustee an Opinion of
     Counsel to the effect that after the passage of 91 days following the
     deposit, the trust funds will not be subject to the effect of any
     applicable bankruptcy, insolvency, reorganization or similar laws affecting
     creditors' rights generally.

     In such event, this Indenture shall cease to be of further effect (except
as provided in the next succeeding paragraph), and the Trustee, on demand of the
Company, shall execute proper instruments acknowledging satisfaction and
discharge under this Indenture.

     However, the Company's obligations in Sections 2.03, 2.04, 2.05, 2.06,
2.07, 3.01, 4.01, 6.07, 6.08 and 7.04 hereof, the Company's and the Guarantors'
obligations in Sections 4.01, 6.07, 7.04 and 9.01 hereof and the Trustee's and
Paying Agent's obligations in Section 7.03 hereof shall survive until the
Securities are no longer outstanding. Thereafter, only the Company's and the
Guarantors' obligations in Section 6.07 hereof and the Trustee's and Paying
Agent's obligations in Section 7.03 hereof shall survive.

     After such irrevocable deposit made pursuant to this Section 7.01(b) and
satisfaction of the other conditions set forth herein, the Trustee upon request
shall acknowledge in writing the discharge of the Company's obligations under
this Indenture except for those surviving obligations specified above.

                                     -39-
<PAGE>

     In order to have money available on a payment date to pay principal of, or
premium, if any, or interest on the Securities, the U.S. Government Obligations
shall be payable as to principal or interest on or before such payment date in
such amounts as will provide the necessary money. U.S. Government Obligations
shall not be callable at the issuer's option.

     SECTION 7.02 Application of Trust Money.

     The Trustee or a trustee satisfactory to the Trustee and the Company shall
hold in trust money or U.S. Government Obligations deposited with it pursuant to
Section 7.01 hereof. It shall apply the deposited money and the money from U.S.
Government Obligations through the Paying Agent and in accordance with this
Indenture to the payment of principal of, and premium, if any, and interest on
the Securities.

     SECTION 7.03 Repayment to Company.

     The Trustee and the Paying Agent shall promptly pay to the Company upon
written request any excess money or securities held by them at any time.

     Subject to the requirements of any applicable abandoned property laws, the
Trustee and the Paying Agent shall pay to the Company upon written request any
money held by them for the payment of principal, or premium, if any, or interest
that remains unclaimed for two years after the date upon which such payment
shall have become due; provided, however, that the Company shall have either
caused notice of such payment to be mailed to each Holder entitled thereto no
less than 30 days prior to such repayment or within such period shall have
published such notice in a financial newspaper of widespread circulation
published in The City of New York. After payment to the Company, Holders
entitled to the money must look to the Company for payment as general creditors
unless an applicable abandoned property law designates another Person, and all
liability of the Trustee and the Paying Agent with respect to such money shall
cease.

     SECTION 7.04 Reinstatement.

     If the Trustee or the Paying Agent is unable to apply any money or U.S.
Government Obligations in accordance with Section 7.01 hereof by reason of any
legal proceeding or by reason of any order or judgment of any court or
governmental authority enjoining, restraining or otherwise prohibiting such
application, the obligations of the Company and the Guarantors under this
Indenture and the Securities shall be revived and reinstated as though no
deposit had occurred pursuant to Section 7.01 hereof until such time as the
Trustee or the Paying Agent is permitted to apply all such money or U.S.
Government Obligations in accordance with Section 7.01 hereof; provided,
however, that if the Company or any Guarantor has made any payment of principal
of or interest on any Securities because of the reinstatement of its
obligations, the Company or such Guarantor shall be subrogated to the rights of
the Holders of such Securities to receive such payment from the money or U.S.
Government Obligations held by the Trustee or the Paying Agent.

                                     -40-
<PAGE>

                                   ARTICLE 8

                                  AMENDMENTS

     SECTION 8.01 Without Consent of Holders.

     The Company, the Guarantors and the Trustee may amend or supplement this
Indenture or the Securities or waive any provision hereof or thereof without the
consent of any Holder:

          (1) to cure any ambiguity, omission, defect or inconsistency;

          (2) to comply with Sections 4.01 and 4.02 hereof;

          (3) to provide for uncertificated Securities in addition to or in
     place of certificated Securities;

          (4) to reflect the release of any Guarantor from its Guarantee, or the
     addition of any Subsidiary of the Company as a Guarantor, in the manner
     provided by Section 9.06 hereof;

          (5) to comply with any requirement in order to effect or maintain the
     qualification of this Indenture under the TIA;

          (6) to add additional guarantees of the Securities;

          (7) to comply with any requirements of the SEC in connection with
     qualifying this Indenture under the TIA;

          (8) to add to the covenants of the Company or any Guarantor for the
     benefit of the Holders or to surrender any right or power herein conferred
     upon the Company or any Guarantor; or

          (9) to make any change that does not adversely affect the rights
     hereunder of any Holder in any material respect.

     Upon the request of the Company and the Guarantors, accompanied by a
resolution of the Board of Directors and of the board of directors, board of
trustees or managing partners of each Guarantor authorizing the execution of any
such supplemental indenture, and upon receipt by the Trustee of the documents
described in Section 8.06 hereof, the Trustee shall join with the Company and
the Guarantors in the execution of any supplemental indenture authorized or
permitted by the terms of this Indenture and make any further appropriate
agreements and stipulations that may be therein contained. After an amendment,
supplement or waiver under this Section 8.01 becomes effective, the Company
shall mail to the Holders of each Security affected thereby a notice briefly
describing the amendment, supplement or waiver. Any failure of the

                                      -41-
<PAGE>

Company to mail such notice, or any defect therein, shall not, however, in any
way impair or affect the validity of any such supplemental indenture.

     SECTION 8.02 With Consent of Holders.

     Except as provided below in this Section 8.02, the Company, the Guarantors
and the Trustee may amend or supplement this Indenture or the Securities with
the written consent (including consents obtained in connection with a tender
offer or exchange offer for Securities or a solicitation of consents in respect
of Securities, provided that in each case such offer or solicitation is made to
all Holders of then outstanding Securities on equal terms) of the Holders of at
least a majority in principal amount of the then outstanding Securities.

     Upon the request of the Company and the Guarantors, accompanied by a
resolution of the Board of Directors and of the board of directors, board of
trustees or managing partners of each Guarantor authorizing the execution of any
such supplemental indenture, and upon the filing with the Trustee of evidence of
the consent of the Holders as aforesaid, and upon receipt by the Trustee of the
documents described in Section 8.06 hereof, the Trustee shall join with the
Company and the Guarantors in the execution of such supplemental indenture.

     It shall not be necessary for the consent of the Holders under this Section
8.02 to approve the particular form of any proposed amendment, supplement or
waiver, but it shall be sufficient if such consent approves the substance
thereof.

     The Holders of a majority in principal amount of the then outstanding
Securities may waive compliance in a particular instance by the Company or the
Guarantors with any provision of this Indenture or the Securities (including
waivers obtained in connection with a tender offer or exchange offer for
Securities or a solicitation of consents in respect of Securities, provided that
in each case such offer or solicitation is made to all Holders of then
outstanding Securities on equal terms).

     However, without the consent of each Holder affected, an amendment,
supplement or waiver under this Section may not:

          (1) reduce the amount of Securities whose Holders must consent to an
     amendment, supplement or waiver;

          (2) reduce the rate of or change the time for payment of interest,
     including default interest, on any Security;

          (3) reduce the principal of or change the fixed maturity of any
     Security or alter the premium or other provisions with respect to
     redemption under Section 10.07 or specified in the Securities;

          (4) make any Security payable in money other than that stated in the
     Security;

                                      -42-
<PAGE>

          (5) impair the right to institute suit for the enforcement of any
     payment of principal of, or premium, if any, or interest on any Security
     pursuant to Sections 5.07 and 5.08 hereof, except as limited by Section
     5.06 hereof;

          (6) make any change in the percentage of principal amount of
     Securities necessary to waive compliance with certain provisions of this
     Indenture pursuant to Section 5.04 or 5.07 hereof or this clause of this
     Section 8.02; or

          (7) waive a continuing Default or Event of Default in the payment of
     principal of, or premium, if any, or interest on the Securities.

     The right of any Holder to participate in any consent required or sought
pursuant to any provision of this Indenture (and the obligation of the Company
to obtain any such consent otherwise required from such Holder) may be subject
to the requirement that such Holder shall have been the Holder of record of any
Securities with respect to which such consent is required or sought as of a date
identified by the Trustee in a notice furnished to Holders in accordance with
the terms of this Indenture.

     SECTION 8.03 Compliance with Trust Indenture Act.

     Every amendment to this Indenture or the Securities shall comply in form
and substance with the TIA as then in effect.

     SECTION 8.04 Revocation and Effect of Consents.

     Until an amendment (which includes any supplement) or waiver becomes
effective, a consent to it by a Holder is a continuing consent by the Holder and
every subsequent Holder of a Security or portion of a Security that evidences
the same debt as the consenting Holder's Security, even if notation of the
consent is not made on any Security. However, any such Holder or subsequent
Holder may revoke the consent as to his or her Security or portion of a Security
if the Trustee receives written notice of revocation before the date the
amendment or waiver becomes effective. An amendment, supplement or waiver
becomes effective in accordance with its terms and thereafter binds every
Holder.

     The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders entitled to consent to any amendment or
waiver or to take any other action under this Indenture. If a record date is
fixed, then notwithstanding the provisions of the immediately preceding
paragraph, those Persons who were Holders at such record date (or their duly
designated proxies), and only those Persons, shall be entitled to consent to
such amendment, supplement or waiver or to revoke any consent previously given,
whether or not such Persons continue to be Holders after such record date. No
consent shall be valid or effective for more than 90 days after such record date
unless consents from Holders of the principal amount of Securities required
hereunder for such amendment or waiver to be effective shall have also been
given and not revoked within such 90-day period.

                                      -43-
<PAGE>

     After an amendment, supplement or waiver becomes effective, it shall bind
every Holder, unless it is of the type described in any of clauses (1) through
(7) of Section 8.02 hereof. In such case, the amendment or waiver shall bind
each Holder who has consented to it and every subsequent Holder that evidences
the same debt as the consenting Holder's Security.

     SECTION 8.05 Notation on or Exchange of Securities.

     If an amendment changes the terms of a Security, the Trustee may require
the Holder of the Security to deliver it to the Trustee. The Trustee may place
an appropriate notation on the Security regarding the changed terms and return
it to the Holder. Alternatively, if the Company or the Trustee so determines,
the Company in exchange for the Security shall issue and the Trustee shall
authenticate a new Security that reflects the changed terms. Failure to make the
appropriate notation or to issue a new Security shall not affect the validity of
such amendment.

     SECTION 8.06 Trustee to Sign Amendments, etc.

     The Trustee shall sign any amendment, waiver or supplemental indenture
authorized pursuant to this Article if the amendment, waiver or supplemental
indenture does not adversely affect the rights, duties, liabilities or
immunities of the Trustee. If it does, the Trustee may, but need not, sign it.
In signing or refusing to sign such amendment, waiver or supplemental indenture,
the Trustee shall be entitled to receive and subject to Section 6.01 hereof,
shall be fully protected in relying upon, an Opinion of Counsel as conclusive
evidence that such amendment, waiver or supplemental indenture is authorized or
permitted by this Indenture, that it is not inconsistent herewith, and that it
will be valid and binding upon the Company and the Guarantors in accordance with
its terms.

                                   ARTICLE 9

                           GUARANTEES OF SECURITIES

     SECTION 9.01 Unconditional Guarantees.

     (a) For value received, the Guarantors, jointly and severally, hereby
fully, unconditionally and absolutely guarantee (the "Guarantees") to the
Holders and to the Trustee the due and punctual payment of the principal of, and
premium, if any, and interest on the Securities and all other amounts due and
payable under this Indenture and the Securities by the Company, when and as such
principal, premium, if any, and interest shall become due and payable, whether
at the stated maturity, upon redemption or by declaration of acceleration or
otherwise, according to the terms of the Securities and this Indenture.

     (b) Failing payment when due of any amount guaranteed pursuant to the
Guarantees, for whatever reason, each Guarantor will be obligated to pay the
same immediately. Each Guarantee hereunder is intended to be a general,
unsecured, senior obligation of each Guarantor and will rank pari passu in right
of payment with all Indebtedness of each such Guarantor that is

                                      -44-
<PAGE>

not, by its terms, expressly subordinated in right of payment to the Guarantee
of such Guarantor. Each of the Guarantors hereby agrees that its obligations
hereunder shall be full, unconditional and absolute, irrespective of the
validity, regularity or enforceability of the Securities, the Guarantees or this
Indenture, the absence of any action to enforce the same, any waiver or consent
by any Holder with respect to any provisions hereof or thereof, any release of
any other Guarantor, the recovery of any judgment against the Company, any
action to enforce the same or any other circumstance which might otherwise
constitute a legal or equitable discharge or defense of a Guarantor. Each of the
Guarantors hereby agrees that in the event of a default in payment of the
principal of, or premium, if any, or interest on the Securities, whether at the
stated maturity, upon redemption or by declaration of acceleration or otherwise,
legal proceedings may be instituted by the Trustee on behalf of the Holders or,
subject to Section 5.06 hereof, by the Holders, on the terms and conditions set
forth in this Indenture, directly against each of the Guarantors to enforce the
Guarantees without first proceeding against the Company.

     (c) The obligations of each Guarantor under this Article 9 shall be as
aforesaid full, unconditional and absolute and shall not be impaired, modified,
released or limited by any occurrence or condition whatsoever, including,
without limitation, (i) any compromise, settlement, release, waiver, renewal,
extension, indulgence or modification of, or any change in, any of the
obligations and liabilities of the Company or any Guarantor contained in the
Securities or this Indenture, (ii) any impairment, modification, release or
limitation of the liability of the Company, any Guarantor or any of their
estates in bankruptcy, or any remedy for the enforcement thereof, resulting from
the operation of any present or future provision of any applicable Bankruptcy
Law, as amended, or other statute or from the decision of any court, (iii) the
assertion or exercise by the Company, any Guarantor or the Trustee of any rights
or remedies under the Securities or this Indenture or their delay in or failure
to assert or exercise any such rights or remedies, (iv) the assignment or the
purported assignment of any property as security for the Securities, including
all or any part of the rights of the Company or any Guarantor under this
Indenture, (v) the extension of the time for payment by the Company or any
Guarantor of any payments or other sums or any part thereof owing or payable
under any of the terms and provisions of the Securities or this Indenture or of
the time for performance by the Company or any Guarantor of any other
obligations under or arising out of any such terms and provisions or the
extension or the renewal of any thereof, (vi) the modification or amendment
(whether material or otherwise) of any duty, agreement or obligation of the
Company or any Guarantor set forth in this Indenture, (vii) the voluntary or
involuntary liquidation, dissolution, sale or other disposition of all or
substantially all of the assets, marshaling of assets and liabilities,
receivership, insolvency, bankruptcy, assignment for the benefit of creditors,
reorganization, arrangement, composition or readjustment of, or other similar
proceeding affecting, the Company or any of the Guarantors or any of their
respective assets, or the disaffirmance of the Securities, the Guarantees or
this Indenture in any such proceeding, (viii) the release or discharge of the
Company or any Guarantor from the performance or observance of any agreement,
covenant, term or condition contained in any of such instruments by operation of
law, (ix) the unenforceability of the Securities, the Guarantees or this
Indenture or (x) any other circumstance which might otherwise constitute a legal
or equitable discharge of a surety or guarantor.

                                      -45-
<PAGE>

     (d) Each of the Guarantors hereby (i) waives diligence, presentment, demand
of payment, filing of claims with a court in the event of the merger, insolvency
or bankruptcy of the Company or a Guarantor, and all demands whatsoever, (ii)
acknowledges that any agreement, instrument or document evidencing the
Guarantees may be transferred and that the benefit of its obligations hereunder
shall extend to each holder of any agreement, instrument or document evidencing
the Guarantees without notice to them and (iii) covenants that its Guarantee
will not be discharged except by complete performance of the Guarantees. Each
Guarantor further agrees that if at any time all or any part of any payment
theretofore applied by any Person to any Guarantee is, or must be, rescinded or
returned for any reason whatsoever, including without limitation, the
insolvency, bankruptcy or reorganization of any Guarantor, such Guarantee shall,
to the extent that such payment is or must be rescinded or returned, be deemed
to have continued in existence notwithstanding such application, and the
Guarantees shall continue to be effective or be reinstated, as the case may be,
as though such application had not been made.

     (e) Each Guarantor shall be subrogated to all rights of the Holders and the
Trustee against the Company in respect of any amounts paid by such Guarantor
pursuant to the provisions of this Indenture; provided, however, that no
Guarantor shall be entitled to enforce or to receive any payments arising out
of, or based upon, such right of subrogation until all of the Securities and the
Guarantees shall have been paid in full or discharged.

     (f) A director, officer, employee or stockholder, as such, of any Guarantor
shall not have any liability for any obligations of such Guarantor under this
Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation.

     SECTION 9.02 Limitation of Guarantor's Liability.

     Each Guarantor and by its acceptance hereof each Holder hereby confirms
that it is the intention of all such parties that the guarantee by such
Guarantor pursuant to its Guarantee not constitute a fraudulent transfer or
conveyance for purposes of any federal, state or foreign law. To effectuate the
foregoing intention, the Holders and each Guarantor hereby irrevocably agree
that each Guarantor's liability shall be limited to the lesser of (i) the
aggregate amount of the obligations of the Company under the Securities and this
Indenture and (ii) the amount, if any, which would not have (A) rendered such
Guarantor "insolvent" (as such term is defined in the Bankruptcy Law and in the
Debtor and Creditor Law of the State of New York) or (B) left such Guarantor
with unreasonably small capital at the time its Guarantee of the Notes was
entered into; provided that it will be a presumption in any lawsuit or other
proceedings in which a Guarantor is a party that the amount guaranteed pursuant
to the Guarantee is the amount set forth in clause (i) above unless any
creditor, or representative of creditors of such Guarantor, or debtor in
possession or trustee in bankruptcy of the Guarantor, otherwise proves in such a
lawsuit that the aggregate liability of the Guarantor is the amount set forth in
clause (ii) above. In making any determination as to solvency or sufficiency of
capital of a Guarantor in accordance with the previous sentence, the right of
such Guarantor to contribution from other Guarantors, and any other rights such
Guarantor may have, contractual or otherwise, shall be taken into account.

                                      -46-
<PAGE>

     SECTION 9.03 Contribution.

     In order to provide for just and equitable contribution among the
Guarantors, the Guarantors agree, inter se, that in the event any payment or
distribution is made by any Guarantor (a "Funding Guarantor") under its
Guarantee, such Funding Guarantor shall be entitled to a contribution from each
other Guarantor in a pro rata amount based on the Adjusted Net Assets of each
Guarantor (including the Funding Guarantor) for all payments, damages and
expenses incurred by the Funding Guarantor in discharging the Company's
obligations with respect to the Securities or any other Guarantor's obligations
with respect to its Guarantee.

     SECTION 9.04 Execution and Delivery of Guarantees.

     To further evidence the Guarantees, each Guarantor hereby agrees that a
notation relating to such Guarantees shall be endorsed on each Security
authenticated and delivered by the Trustee and executed by either manual or
facsimile signature of an Officer of each Guarantor.

     Each of the Guarantors hereby agrees that its Guarantee shall remain in
full force and effect notwithstanding any failure to endorse on each Security a
notation relating to such Guarantee.

     If an Officer of a Guarantor whose signature is on this Indenture or a
Security no longer holds that office at the time the Trustee authenticates such
Security or at any time thereafter, such Guarantor's Guarantee of such Security
shall be valid nevertheless.

     The delivery of any Security by the Trustee, after the authentication
thereof hereunder, shall constitute due delivery of any Guarantee set forth in
this Indenture on behalf of the Guarantor.

     SECTION 9.05 Addition of Guarantors.

     (a) If any Subsidiary of the Company guarantees (or becomes a co-obligor
on) any Funded Indebtedness of the Company other than the Securities at any time
subsequent to the Issue Date (including, without limitation, following any
release of such Subsidiary pursuant to Section 9.06 hereof from any Guarantee
previously provided by it under this Article 9), then the Company shall (i)
cause the Securities to be equally and ratably guaranteed by such Subsidiary,
but only to the extent that the Securities are not already guaranteed by such
Subsidiary on reasonably comparable terms and (ii) cause such Subsidiary to
execute and deliver a supplemental indenture, in substantially the form of
Exhibit E hereto, evidencing its provision of a Guarantee in accordance with
clause (b) below.

     (b) Any Person that was not a Guarantor on the Issue Date may become a
Guarantor by executing and delivering to the Trustee (i) a supplemental
indenture in form and substance satisfactory to the Trustee, which subjects such
Person to the provisions (including the representations and warranties) of this
Indenture as a Guarantor and (ii) an Opinion of Counsel and Officers'
Certificate to the effect that such supplemental indenture has been duly
authorized

                                      -47-
<PAGE>

and executed by such Person and constitutes the legal, valid, binding and
enforceable obligation of such Person (subject to such customary exceptions
concerning creditors' rights and equitable principles as may be acceptable to
the Trustee in its discretion and provided that no opinion need be rendered
concerning the enforceability of the Guarantee).

     SECTION 9.06 Release of Guarantee.

     Notwithstanding anything to the contrary in this Article 9, in the event
that any Guarantor shall no longer be a guarantor of (or co-obligor on) any
Funded Indebtedness of the Company other than the Securities and other than
Funded Indebtedness of the Company (i) subject to a release provision
substantially similar to this Section 9.06 and (ii) the related guarantee (or
obligation) of which will be released substantially concurrently with the
release of the Guarantee of such Guarantor pursuant to this Section 9.06, and so
long as no Default or Event of Default shall have occurred or be continuing,
such Guarantor, upon giving notice to the Trustee to the foregoing effect, shall
be deemed to be released from all of its obligations under this Indenture and
the Guarantee of such Guarantor shall be of no further force or effect.
Following the receipt by the Trustee of any such notice, the Company shall cause
this Indenture to be amended as provided in Section 8.01 hereof; provided,
however, that the failure to so amend this Indenture shall not affect the
validity of the termination of the Guarantee of such Guarantor.

     SECTION 9.07 Consent to Jurisdiction and Service of Process.

     Each Guarantor that is not organized under the laws of the United States
(including the States and the District of Columbia) (each a "Non-U.S.
Guarantor") hereby appoints the principal office of CT Corporation System in The
City of New York which, on the date hereof, is located at 1633 Broadway, New
York, New York 10019, as the authorized agent thereof (the "Authorized Agent")
upon whom process may be served in any action, suit or proceeding arising out of
or based on this Indenture or the Securities which may be instituted in the
Supreme Court of the State of New York or the United States District Court for
the Southern District of New York, in either case in The Borough of Manhattan,
The City of New York, by the Holder of any Security, and each Non-U.S. Guarantor
hereby waives any objection which it may now or hereafter have to the laying of
venue of any such proceeding and expressly and irrevocably accepts and submits,
for the benefit of the Holders from time to time of the Securities, to the
nonexclusive jurisdiction of any such court in respect of any such action, suit
or proceeding, for itself and with respect to its properties, revenues and
assets. Such appointment shall be irrevocable unless and until the appointment
of a successor authorized agent for such purpose, and such successor's
acceptance of such appointment, shall have occurred. Each Non-U.S. Guarantor
agrees to take any and all actions, including the filing of any and all
documents and instruments, that may be necessary to continue such appointment in
full force and effect as aforesaid. Service of process upon the Authorized Agent
with respect to any such action shall be deemed, in every respect, effective
service of process upon any such Non-U.S. Guarantor. Notwithstanding the
foregoing, any action against any Non-U.S. Guarantor arising out of or based on
any Security may also be instituted by the Holder of such Security in any court
in the jurisdiction of organization of such Non-U.S. Guarantor, and such Non-
U.S. Guarantor expressly

                                      -48-
<PAGE>

accepts the jurisdiction of any such court in any such action. The Company shall
require the Authorized Agent to agree in writing to accept the foregoing
appointment as agent for service of process.

     SECTION 9.08 Waiver of Immunity.

     To the extent that any Non-U.S. Guarantor or any of its properties, assets
or revenues may have or may hereafter become entitled to, or have attributed to
it, any right of immunity, on the grounds of sovereignty or otherwise, from any
legal action, suit or proceeding, from the giving of any relief in any thereof,
from set-off or counterclaim, from the jurisdiction of any court, from service
of process, from attachment upon or prior to judgment, from attachment in aid of
execution of judgment, or from execution of judgment, or other legal process or
proceeding for the giving of any relief or for the enforcement of any judgment,
in any jurisdiction in which proceedings may at any time be commenced, with
respect to its obligations, liabilities or any other matter under or arising out
of or in connection with this Indenture or the Securities, such Non-U.S.
Guarantor, to the maximum extent permitted by law, hereby irrevocably and
unconditionally waives, and agrees not to plead or claim, any such immunity and
consents to such relief and enforcement.

     SECTION 9.09 Judgment Currency.

     Each Non-U.S. Guarantor agrees to indemnify the Trustee and each Holder
against any loss incurred by it as a result of any judgment or order being given
or made and expressed and paid in a currency (the "Judgment Currency") other
than United States dollars and as a result of any variation as between (i) the
rate of exchange at which the United States dollar amount is converted into the
Judgment Currency for the purpose of such judgment or order and (ii) the spot
rate of exchange in The City of New York at which the Trustee or such Holder on
the date of payment of such judgment or order is able to purchase United States
dollars with the amount of the Judgment Currency actually received by the
Trustee or such Holder. The foregoing indemnity shall constitute a separate and
independent obligation of each Non-U.S. Guarantor and shall continue in full
force and effect notwithstanding any such judgment or order as aforesaid. The
term "spot rate of exchange" shall include any premiums and costs of exchange
payable in connection with the purchase of, or conversion into, United States
dollars.

                                  ARTICLE 10

                                  REDEMPTION

     SECTION 10.01 Notices to Trustee.

     If the Company elects to redeem Securities pursuant to the redemption
provisions of Section 10.07, it shall furnish to the Trustee, at least 45 days
but not more than 60 days before a Redemption Date, an Officers' Certificate
setting forth the Redemption Date, the principal amount of Securities to be
redeemed and the Redemption Price.

                                      -49-
<PAGE>

     SECTION 10.02 Selection of Securities to be Redeemed.

     If less than all of the Securities are to be redeemed, the Trustee shall
select the Securities to be redeemed by such method as the Trustee in its sole
discretion shall deem fair and appropriate. The particular Securities to be
redeemed shall be selected, unless otherwise provided herein, not less than 30
days nor more than 60 days prior to the Redemption Date by the Trustee from the
outstanding Securities not previously called for redemption.

     The Trustee shall promptly notify the Company in writing of the Securities
selected for redemption and, in the case of any Security selected for partial
redemption, the principal amount thereof to be redeemed. Securities and portions
of them selected shall be in amounts of $1,000 or whole multiples of $1,000.
Except as provided in the preceding sentence, provisions of this Indenture that
apply to Securities called for redemption also apply to portions of Securities
called for redemption.

     SECTION 10.03 Notices to Holders.

     (a)  At least 30 days but not more than 60 days before a Redemption Date,
          the Company shall mail in conformity with Section 11.02 a notice of
          redemption to each Holder whose Securities are to be redeemed.

          The Notice shall identify the Securities to be redeemed and shall
          state:

          (i)   the Redemption Date;

          (ii)  the Redemption Price;

          (iii) if any Security is being redeemed in part, the portion of the
                principal amount of such Security to be redeemed and that, after
                the Redemption Date, upon surrender of such Security, a new
                Security or Securities in principal amount equal to the
                unredeemed portion will be issued;

          (iv)  the name and address of the Paying Agent;

          (v)   that Securities called for redemption must be surrendered to the
                Paying Agent at the address specified in such notice to collect
                the Redemption Price;

          (vi)  that unless the Company defaults in making the redemption
                payment, interest on Securities called for redemption ceases to
                accrue on and after the Redemption Date and the only remaining
                right of the Holders is to receive payment of the Redemption
                Price upon surrender to the Paying Agent of the Securities; and

          (vii) the aggregate principal amount of Securities being redeemed.

                                      -50-
<PAGE>

     If any of the Securities to be redeemed is in the form of a Global
Security, then the Company shall modify such notice to the extent necessary to
accord with the procedures of the Depositary applicable to redemptions.

     (b)  At the Company's request, the Trustee shall give the notice required
          in Section 10.03(a) in the Company's name; provided, however, that the
          Company shall deliver to the Trustee, at least 45 days prior to the
          Redemption Date, an Officer's Certificate requesting that the Trustee
          give such notice and setting forth the information to be stated in
          such notice as provided in Section 10.03(a).

     SECTION 10.04 Effect of Notices of Redemption.

     Once notice of redemption is mailed pursuant to Section 10.03, Securities
called for redemption become due and payable on the Redemption Date at the
Redemption Price. Upon surrender to the Paying Agent, such Securities shall be
paid out at the Redemption Price.

     SECTION 10.05 Deposit of Redemption Price.

     At least one Business Day prior to the Redemption Date, the Company shall
deposit with the Trustee or with the Paying Agent money sufficient to pay the
Redemption Price of all Securities to be redeemed on that date. The Trustee or
the Paying Agent shall return to the Company any money not required for that
purpose less the expenses of the Trustee as provided herein.

     If the Company complies with the preceding paragraph, interest on the
Securities or portions thereof to be redeemed (whether or not such Securities
are presented for payment) will cease to accrue on the applicable Redemption
Date. If any Security called for redemption shall not be so paid upon surrender
because of the failure of the Company to comply with the preceding paragraph,
then interest will be paid on the unpaid principal and premium, if any, from the
Redemption Date until such principal and premium are paid and, to the extent
lawful, on any interest not paid on such unpaid principal, in each case at the
rate provided in the Securities and in Section 3.01.

     SECTION 10.06 Securities Redeemed in Part.

     Upon surrender of a Security that is redeemed in part, the Company shall
issue and the Trustee shall authenticate for the Holder, at the expense of the
Company, a new Security equal in principal amount to the unredeemed portion of
the Security surrendered.

     SECTION 10.07 Optional Redemption.

     The Securities may be redeemed at any time, at the option of the Company,
in whole or from time to time in part, at the Redemption Price specified in the
Securities.

                                      -51-
<PAGE>

     Any redemption pursuant to this Section 10.07 shall be made, to the extent
applicable, pursuant to the provisions of Sections 10.01 through 10.06.

                                      -52-
<PAGE>

                                  ARTICLE 11

                                 MISCELLANEOUS

     SECTION 11.01 Trust Indenture Act Controls.

     If any provision of this Indenture limits, qualifies or conflicts with the
duties imposed by operation of TIA Section 318(c), the imposed duties shall
control.

     SECTION 11.02 Notices.

     Any notice or communication by the Company, the Guarantors or the Trustee
to the others is duly given if in writing and delivered in person or mailed by
first-class mail (registered or certified, return receipt requested), telecopier
or overnight air courier guaranteeing next day delivery, to the other's address:

     If to the Company or the Guarantors:

            Varco International, Inc.
            2835 Holmes Road
            Houston, Texas 77051
            Attention: General Counsel
            Telecopier No. (713) 799-5227

     If to the Trustee:

            The Bank of New York
            101 Barclay Floor 7E
            New York, New York 10286
            Attention: Corporate Trust
            Telecopier No. (904) 645-1930

     The Company, the Guarantors or the Trustee by notice to the others may
designate additional or different addresses for subsequent notices or
communications.

     All notices and communications shall be deemed to have been duly given: at
the time delivered by hand, if personally delivered; five Business Days after
being deposited in the mail, postage prepaid, if mailed; when receipt
acknowledged, if telecopied; and the next Business Day after timely delivery to
the courier, if sent by overnight air courier guaranteeing next day delivery.

     Any notice or communication to a Holder shall be mailed by first-class
mail, postage prepaid, to the Holder's address shown on the register kept by the
Registrar. Failure to mail a

                                      -53-
<PAGE>

notice or communication to a Holder or any defect in it shall not affect its
sufficiency with respect to other Holders.

     If a notice or communication is mailed in the manner provided above within
the time prescribed, it is duly given, whether or not the addressee receives it.

     If the Company or any Guarantor mails a notice or communication to Holders,
it shall mail a copy to the Trustee and each Agent at the same time.

     All notices or communications, including without limitation notices to the
Trustee or the Company or any Guarantor by Holders, shall be in writing, except
as set forth below, and in the English language.

     In case by reason of the suspension of regular mail service, or by reason
of any other cause, it shall be impossible to mail any notice required by this
Indenture, then such method of notification as shall be made with the approval
of the Trustee shall constitute a sufficient mailing of such notice.

     SECTION 11.03 Communication by Holders with Other Holders.

     Holders may communicate pursuant to TIA Section 312(b) with other Holders
with respect to their rights under this Indenture or the Securities. The
Company, the Guarantors, the Trustee, the Registrar and anyone else shall have
the protection of TIA Section 312(c).

     SECTION 11.04 Certificate and Opinion as to Conditions Precedent.

     Upon any request or application by the Company or any Guarantor to the
Trustee to take any action under this Indenture, the Company or such Guarantor
shall, if requested by the Trustee, furnish to the Trustee:

          (1) an Officers' Certificate (which shall include the statements set
     forth in Section 11.05 hereof) stating that, in the opinion of the signers,
     all conditions precedent and covenants, if any, provided for in this
     Indenture relating to the proposed action have been complied with; and

          (2) an Opinion of Counsel (which shall include the statements set
     forth in Section 11.05 hereof) stating that, in the opinion of such
     counsel, all such conditions precedent and covenants have been complied
     with.

     SECTION 11.05 Statements Required in Certificate or Opinion.

     Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include:

                                      -54-
<PAGE>

          (1) a statement that the Person making such certificate or opinion has
     read such covenant or condition;

          (2) a brief statement as to the nature and scope of the examination or
     investigation upon which the statements or opinions contained in such
     certificate or opinion are based;

          (3) a statement that, in the opinion of such Person, he has made such
     examination or investigation as is necessary to enable him to express an
     informed opinion as to whether or not such covenant or condition has been
     complied with; and

          (4) a statement as to whether or not, in the opinion of such Person,
     such condition or covenant has been complied with.

     SECTION 11.06 Rules by Trustee and Agents.

     The Trustee may make reasonable rules for action by or at a meeting of
Holders. The Registrar or the Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

     SECTION 11.07 Legal Holidays.

     If a payment date is a Legal Holiday at a place of payment, payment may be
made at that place on the next succeeding day that is not a Legal Holiday, and
no interest shall accrue for the intervening period.

     SECTION 11.08 No Recourse Against Others.

     A director, officer, employee or stockholder of the Company or any
Guarantor, as such, shall not have any liability for any obligations of the
Company or such Guarantor under the Securities or this Indenture or for any
claim based on, in respect of or by reason of such obligations or their
creation. Each Holder by accepting a Security waives and releases all such
liability. The waiver and release shall be part of the consideration for the
issue of Securities.

     SECTION 11.09 Governing Law.

     THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUCTED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

     SECTION 11.10 No Adverse Interpretation of Other Agreements.

     This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company, any Guarantor or any other Subsidiary of the Company.
Any such indenture, loan or debt agreement may not be used to interpret this
Indenture.

                                      -55-
<PAGE>

     SECTION 11.11 Successors.

     All agreements of the Company and the Guarantors in this Indenture and the
Securities shall bind their respective successors. All agreements of the Trustee
in this Indenture shall bind its successor.

     SECTION 11.12 Severability.

     In case any provision in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

     SECTION 11.13 Counterpart Originals.

     The parties may sign any number of copies of this Indenture. Each signed
copy shall be an original, but all of them together represent the same
agreement.

     SECTION 11.14 Table of Contents, Headings, etc.

     The Table of Contents, Cross-Reference Table and Headings of the Articles
and Sections of this Indenture have been inserted for convenience of reference
only, are not to be considered a part hereof and shall in no way modify or
restrict any of the terms or provisions hereof.

                                      -56-
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed as of the day and year first above written.

                                         VARCO INTERNATIONAL, INC.

                                         By: /s/ JOSEPH C. WINKLER
                                            ----------------------------------
                                            Name:  Joseph C. Winkler
                                            Title: Executive Vice President,
                                                   Chief Financial Officer and
                                                   Treasurer

                                         VARCO I/P, INC.
                                         TUBO-FGS, LLC
                                         TUBOSCOPE (HOLDING U.S.) INC.
                                         FIBER GLASS SYSTEMS HOLDINGS, LLC
                                         FIBER GLASS SYSTEMS, LP
                                         VARCO, LP
                                         QUALITY TUBING INC
                                         TUBOSCOPE PIPELINE SERVICES INC.
                                         ENVIRONMENTAL PROCEDURES INC.

                                         By: /s/ JOSEPH C. WINKLER
                                            ----------------------------------
                                            Name:  Joseph C. Winkler
                                            Title: Vice President

                                         THE BANK OF NEW YORK

                                         By: /s/ TAMARA K. ELLIS
                                            ----------------------------------
                                            Name:  Tamara K. Ellis
                                            Title: Agent

                                      -57-
<PAGE>

                                   EXHIBIT A

                              [FACE OF SECURITY]

                           VARCO INTERNATIONAL, INC.

                       7 1/4% SERIES [A/B] NOTE DUE 2011

                               CUSIP ___________

     No. 1                                                        $ ____________

     Varco International, Inc., a Delaware corporation (the "Company"), for
value received promises to pay to ___________________________ or registered
assigns, the principal sum of $___________ Dollars on __________, 2011 or such
greater or lesser amount as is indicated on the Schedule of Exchanges of
Securities on the other side of this Security./1/

     Interest Payment Dates:                        May 1 and November 1

     Record Dates:                                  April 15 and October 15

     Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place. Capitalized terms used
herein and not otherwise defined shall have the meanings ascribed to them in the
Indenture.

     IN WITNESS WHEREOF, the Company has caused this Security to be signed
manually or by facsimile by its duly authorized officers.

Dated:                                            VARCO INTERNATIONAL, INC.

                                                  By: _________________________

                                                  By: _________________________

Certificate of Authentication:

________________________________________________
as Trustee, certifies that this is one of the Securities
referred to in the within-mentioned Indenture.

By: ____________________________________
      Authorized Signature

_______________________________

/1/  This phrase should be included only if the Security is a global Security.

                                      A-1
<PAGE>

     [UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN
DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE
DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO
THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY
SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR
DEPOSITARY. THE DEPOSITORY TRUST COMPANY SHALL ACT AS THE DEPOSITARY UNTIL A
SUCCESSOR SHALL BE APPOINTED BY THE COMPANY AND THE REGISTRAR. UNLESS THIS
CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
COMPANY (55 WATER STREET, NEW YORK, NEW YORK) ("DTC"), TO THE ISSUER OR ITS
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS MAY BE
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]/2/

     [THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION
EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933 (The
"SECURITIES ACT"), AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR OTHERWISE
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION
THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF
THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5
OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.]

     [THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A)
THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)
INSIDE THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A
QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT)
IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (II) OUTSIDE THE UNITED
STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE
SECURITIES ACT, (III) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE
SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (IV) PURSUANT
TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF
CASES (I) THROUGH (IV) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY
STATE OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH

______________

/2/ This paragraph should be included only if the Security is issued in global
form.

                                      A-2
<PAGE>

SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT
OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.]/3/

_____________

/3/ These paragraphs should be included only if the Security is a Transfer
Restricted Security.

                                      A-3
<PAGE>

                              [REVERSE OF SECURITY]

                            VARCO INTERNATIONAL, INC.

                    7 1/4% SERIES [A/B] NOTE DUE May 1, 2011

     This Security is one of a duly authorized issue of 7 1/4% Series A/Series B
Notes due May 1, 2011 (the "Securities") of Varco International, Inc., a
Delaware corporation (the "Company").

     1. Interest. The Company promises to pay interest on the principal amount
of this Security at 7 1/4% per annum from May 1, 2001 until maturity. The
Company will pay interest semiannually on May 1 and November 1 of each year
(each an "Interest Payment Date"), or if any such day is not a Business Day, on
the next succeeding Business Day. Interest on the Securities will accrue from
the most recent Interest Payment Date on which interest has been paid or, if no
interest has been paid, from May 1, 2001; provided that if there is no existing
Default in the payment of interest, and if this Security is authenticated
between a record date referred to on the face hereof and the next succeeding
Interest Payment Date, interest shall accrue from such next succeeding Interest
Payment Date; provided, further, that the first Interest Payment Date shall be
November 1, 2001. The Company also promises to pay any additional interest
required by Section 6 of the Registration Rights Agreement (as defined in
paragraph 17 below), upon the conditions, at the rates and for the periods
specified therein. Further, the Company shall pay interest on overdue principal
and premium, if any, from time to time on demand at a rate equal to the interest
rate then in effect; it shall pay interest on overdue installments of interest
(without regard to any applicable grace periods) from time to time on demand at
the same rate to the extent lawful. Interest will be computed on the basis of a
360-day year of twelve 30-day months.

     2. Method of Payment. The Company will pay interest on the Securities
(except defaulted interest) to the Persons who are registered Holders of
Securities at the close of business on the record date next preceding the
Interest Payment Date, even if such Securities are canceled after such record
date and on or before such Interest Payment Date. The Holder must surrender this
Security to a Paying Agent to collect principal and premium, if any, payments.
The Company will pay the principal of, and premium, if any, and interest on the
Securities in money of the United States of America that at the time of payment
is legal tender for payment of public and private debts. Payments to Holders of
principal, premium, if any, and interest shall be paid by wire transfer of
immediately available funds to the accounts specified by the Holders thereof or,
if no such account is specified, by mailing a check to each such Holder's
registered address.

     3. Ranking and Guarantees. The Securities are senior unsecured obligations
of the Company. The Company's obligations to pay principal, premium, if any, and
interest with respect to the Securities are unconditionally guaranteed on a
joint and several basis (the "Guarantees") by the guarantors (the "Guarantors"),
parties to the Indenture. Each of the Guarantees is an unsecured obligation of
the Guarantor providing such Guarantee. Certain limitations to the obligations
of the Guarantors are set forth in further detail in the Indenture. References
herein to the Indenture or the Securities shall be deemed also to refer to the
Guarantees set forth in the Indenture except where the context otherwise
requires.

                                      A-4
<PAGE>

     4. Optional Redemption. The Company may redeem all or part of the
Securities at any time at its option at a redemption price equal to the greater
of (1) the principal amount of the Securities being redeemed plus accrued and
unpaid interest to the redemption date and (2) the Make-Whole Amount for the
notes being redeemed (the "Redemption Price").

     As used in this Security:

     "Make Whole Amount" means the sum, as determined by a Quotation Agent, of
the present values of the principal amount of the Securities to be redeemed,
together with scheduled payments of interest (exclusive of interest to the
redemption date) from the Redemption Date to the maturity date of the Securities
being redeemed, in each case discounted to the Redemption Date on a semi-annual
basis, assuming a 360-day year consisting of twelve 30-day months, at the
Adjusted Treasury Rate, plus accrued and unpaid interest on the principal amount
of the Securities being redeemed to the Redemption Date.

     "Adjusted Treasury Rate" means, with respect to any Redemption Date, (i)
the yield, under the heading which represents the average for the immediately
preceding week, appearing in the most recently published statistical release
designated "H.15 (519)" or any successor publication which is published weekly
by the Board of Governors of the Federal Reserve System and which establishes
yields on actively traded United States Treasury securities adjusted to constant
maturity under the caption "Treasury Constant Maturities," for the maturity
corresponding to the Comparable Treasury Issue (if no maturity is within three
months before or after the remaining term of the notes being redeemed, yields
for the two published maturities most closely corresponding to the Comparable
Treasury Issue shall be determined and the Adjusted Treasury Rate shall be
interpolated or extrapolated from such yields on a straight line basis, rounding
to the nearest month) or (ii) if such release (or any successor release) is not
published during the week preceding the calculation date or does not contain
such yields, the rate per year equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue (expressed as a percentage of its
principal amount) equal to the Comparable Treasury Price for such Redemption
Date, in each case calculated on the third business day preceding the redemption
date, plus 0.30%.

     "Comparable Treasury Issue" means the United States Treasury security
selected by the Quotation Agent as having a maturity comparable to the remaining
term from the Redemption Date to the maturity date of the Securities that would
be utilized, at the time of selection and in accordance with customary financial
practice, in pricing new issues of corporate debt securities of comparable
maturity to the remaining term of the notes.

     "Comparable Treasury Price" means, with respect to any Redemption Date, if
clause (ii) of the Adjusted Treasury Rate is applicable, the average of three,
or such lesser number as is obtained by the indenture trustee, Reference
Treasury Dealer Quotations for such Redemption Date.

     "Quotation Agent" means the Reference Treasury Dealer selected by the
indenture trustee after consultation with the Company.

                                      A-5
<PAGE>

     "Reference Treasury Dealer" means any of Credit Suisse First Boston
Corporation and its successors and assigns and two other nationally recognized
investment banking firms selected by the Company that are primary U.S.
Government securities dealers.

     "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Trustee, of the bid and asked prices for the Comparable Treasury Issue,
expressed in each case as a percentage of its principal amount, quoted in
writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m., New York
City time, on the third business day preceding such redemption date.

     5. Paying Agent and Registrar. Initially, The Bank of New York (the
"Trustee"), the Trustee under the Indenture, will act as Paying Agent and
Registrar. The Company may change any Paying Agent, Registrar, co-registrar or
additional paying agent without notice to any Holder. The Company may act in any
such capacity.

     6. Indenture. The Company issued the Securities under an Indenture dated as
of May 1, 2001 (the "Indenture") among the Company, the Guarantors and the
Trustee. The terms of the Securities include those stated in the Indenture and
those made part of the Indenture by reference to the Trust Indenture Act of
1939, as amended (15 U.S. Code Sections 77aaa-77bbbb), as in effect on the date
of execution of the Indenture. The Securities are subject to all such terms, and
Holders are referred to the Indenture and such Act for a statement of such
terms. The Securities are unsecured general obligations of the Company limited
to $200,000,000 in aggregate principal amount in the case of the Notes issued on
the Issue Date (as defined in the Indenture).

     7. Denominations, Transfer, Exchange. The Securities are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Securities may be registered and Securities may be exchanged as
provided in the Indenture. The Registrar and the Trustee may require a Holder,
among other things, to furnish appropriate endorsements and transfer documents
and to pay any taxes and fees required by law or permitted by the Indenture. The
Registrar need not exchange or register the transfer of any Securities during
the period between a record date and the corresponding Interest Payment Date.

     8. Persons Deemed Owners. The registered Holder of a Security shall be
treated as its owner for all purposes.

     9. Amendments and Waivers. Except as otherwise provided in Section 8.02 of
the Indenture, the Company, the Guarantors and the Trustee may amend or
supplement the Indenture and the Securities with the written consent (including
consents obtained in connection with a tender offer or exchange offer for
Securities or a solicitation of consents in respect of Securities, provided that
in each case such offer or solicitation is made to all Holders of then
outstanding Securities on equal terms) of the Holders of at least a majority in
principal amount of the then outstanding Securities. Subject to Sections 5.07
and 8.02 of the Indenture, the Holders of a majority in principal amount of the
then outstanding Securities by notice to the Trustee may waive an existing
Default or Event of Default and its consequences (including waivers obtained in
connection with a tender offer or exchange offer for Securities or a
solicitation of consents in respect of Securities, provided that in each case
such offer or solicitation is made to all Holders

                                      A-6
<PAGE>

of then outstanding Securities on equal terms), except (1) a continuing Default
or Event of Default in the payment of the principal of, or premium, if any, or
interest on any Security or (2) a continued Default in respect of a provision
that under Section 8.02 of the Indenture cannot be amended with the consent of
each Holder affected. Without the consent of any Holder, the Company, the
Guarantors and the Trustee may amend or supplement the Indenture or the
Securities or waive any provision of the Indenture or the Securities: to cure
any ambiguity, omission, defect or inconsistency; to provide for uncertificated
Securities in addition to or in place of certificated Securities; to comply with
Sections 4.01 and 4.02 of the Indenture; to reflect the release of any Guarantor
from its Guarantee, or the addition of any Subsidiary of the Company as a
Guarantor, in the manner provided by Section 9.06 of the Indenture; to comply
with any requirement in order to effect or maintain the qualification of this
Indenture under the Trust Indenture Act of 1939, as amended (the "TIA"); to add
additional guarantees of the Securities; to comply with any requirements of the
SEC in connection with qualifying the Indenture under the TIA; to add to the
covenants of the Company or any Guarantor for the benefit of the Holders or to
surrender any right conferred upon the Company or any Guarantor in the
Indenture; or to make any change that does not adversely affect the rights of
any Holder in any material respect.

     10. Defaults and Remedies. If an Event of Default (other than an Event of
Default specified in clause (6) or (7) of Section 5.01 of the Indenture with
respect to the Company or any Guarantor) occurs and is continuing, the Trustee
by notice to the Company, or the Holders of at least 25% in principal amount of
the then outstanding Securities by notice to the Company and the Trustee, may
declare the principal of and premium, if any, and accrued and unpaid interest on
all then outstanding Securities to be due and payable immediately. If an Event
of Default specified in clause (6) or (7) of Section 5.01 of the Indenture with
respect to the Company or any Guarantor occurs, such amounts shall ipso facto
become and be immediately due and payable without any declaration, notice or
other act on the part of the Trustee or any Holder. The Holders of a majority in
principal amount of the then outstanding Securities by written notice to the
Trustee may rescind an acceleration and its consequences (other than nonpayment
of principal of, or premium, if any, or interest on the Securities) if the
rescission would not conflict with any judgment or decree and if all existing
Events of Default have been cured or waived, except nonpayment of principal, or
premium, if any, or interest that has become due solely because of the
acceleration. Holders may not enforce the Indenture or the Securities except as
provided in the Indenture. The Trustee may refuse to perform any duty or
exercise any right or power unless it receives indemnity reasonably satisfactory
to it against any loss, liability or expense. Except in the case of a Default or
Event of Default in payment of principal of, or premium, if any, or interest on
any Security, the Trustee may withhold notice of the Default or Event of Default
if and so long as a committee of its Trust Officers in good faith determines
that withholding the notice is in the interests of Holders. The Company must
furnish an annual compliance certificate to the Trustee, as more fully described
in Section 3.04 of the Indenture.

     11. Discharge Prior to Maturity. As more fully described in, and subject
to, Article VII of the Indenture, the Indenture shall be discharged and canceled
upon the payment of all of the Securities and shall be discharged except for
certain obligations upon the irrevocable deposit with the Trustee of funds or
U.S. Government Obligations sufficient for such payment.

     12. Trustee Dealings with Company and Guarantors. The Trustee, in its
individual or any other capacity, may make loans to, accept deposits from, and
perform services for the Company, the Guarantors or their respective Affiliates,
and may otherwise deal with the Company, the Guarantors or their respective
Affiliates, as if it were not Trustee.

                                      A-7
<PAGE>

     13. No Recourse Against Others. A director, officer, employee or
stockholder, as such, of the Company or any Guarantor shall not have any
liability for any obligations of the Company or such Guarantor under the
Securities or the Indenture or for any claim based on, in respect of or by
reason of such obligations or their creation. Each Holder by accepting a
Security waives and releases all such liability. The waiver and release are part
of the consideration for the issuance of the Securities.

     14. Authentication. This Security shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

     15. CUSIP Numbers. Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Securities as a convenience to the Holders of
the Securities. No representation is made as to the accuracy of such numbers as
printed on the Securities and reliance may be placed only on the other
identification numbers printed thereon.

     16. Abbreviations. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

     17. Additional Rights of Holders of Transfer Restricted Securities. In
addition to the rights provided to Holders of Securities under the Indenture,
Holders of Transfer Restricted Securities shall have all the rights set forth in
the Registration Rights Agreement, dated as of the Issue Date (the "Registration
Rights Agreement"), among the Company, the Guarantors named therein and the
Initial Purchasers.

     THE COMPANY WILL FURNISH TO ANY HOLDER UPON WRITTEN REQUEST AND WITHOUT
CHARGE A COPY OF THE INDENTURE. REQUEST MAY BE MADE TO:

         VARCO INTERNATIONAL, INC.
         2835 HOLMES ROAD
         HOUSTON, TEXAS 77051
         ATTENTION:  GENERAL COUNSEL

                                      A-8
<PAGE>

                          FORM OF NOTATION ON SECURITY

                             RELATING TO GUARANTEES

     Each Guarantor (which term includes any successor Person under the
Indenture), has fully, unconditionally and absolutely guaranteed, to the extent
set forth in the Indenture and subject to the provisions in the Indenture, the
due and punctual payment of the principal of, and premium, if any, and interest
on the Securities and all other amounts due and payable under the Indenture and
the Securities by the Company.

     The obligations of the Guarantors to the Holders of Securities and to the
Trustee pursuant to the Guarantees and the Indenture are expressly set forth in
Article 9 of the Indenture and reference is hereby made to the Indenture for the
precise terms of the Guarantees.

                                           VARCO I/P, INC.
                                           TUBO-FGS, LLC
                                           TUBOSCOPE (HOLDING U.S.) INC.
                                           FIBER GLASS SYSTEMS HOLDINGS, LLC
                                           FIBER GLASS SYSTEMS, LP
                                           VARCO, LP
                                           QUALITY TUBING INC
                                           TUBOSCOPE PIPELINE SERVICES INC.
                                           ENVIRONMENTAL PROCEDURES INC.

                                                    By:________________________

                                      A-9
<PAGE>

                                ASSIGNMENT FORM

     To assign this Security, fill in the form below: (I) or (we) assign and
transfer this Security to ___________________________

_______________________________________________________________________________
(Insert assignee's social security or tax I.D. number)

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________
(Print or type assignee's name, address and zip code)

and irrevocably appoint _______________________________________________________
as agent to transfer this Security on the books of the Company. The agent may
substitute another to act for him.

_______________________________________________________________________________

Date: ___________________________

Your Signature: ________________________________________________________________
                (Sign exactly as your name appears on the face of this Security)

Signature Guarantee:  __________________________________________________________
                      (Participant in a Recognized Signature Guaranty Medallion

______________
Program)

                                     A-10
<PAGE>

                     SCHEDULE OF EXCHANGES OF SECURITIES*

         The following exchanges, redemptions or repurchases of a part of this
Global Security have been made:

<TABLE>
<CAPTION>
                                                                             Principal
                               Amount of              Amount of              Amount of            Signature of
                              decrease in            increase in          Global Security          authorized
                               Principal              Principal              following          Officer, Trustee
                               Amount of              Amount of             decrease (or          or Security
  Date of Transaction       Global Security        Global Security           increase)             Custodian
  -------------------     ------------------     ------------------        -------------           ---------
  <S>                     <C>                    <C>                       <C>                     <C>
</TABLE>

         ______________________

         * This should be included only if the Security is issued in global
form.

                                     A-11
<PAGE>

                                   EXHIBIT B

                   CERTIFICATE TO BE DELIVERED UPON EXCHANGE

                   OR REGISTRATION OF TRANSFER OF SECURITIES

     Address of Trustee

     Re: 7 1/4% Series [A/B] Notes due 2011 of Varco International, Inc.

     This Certificate relates to $_____ principal amount of Securities held in
*______ book-entry or *______ definitive form by _____________________ (the
"Transferor").

     The Transferor*:

     [_] has requested the Trustee by written order to deliver in exchange for
its beneficial interest in the Global Securities held by the Depositary a
Definitive Security or Securities equal to its beneficial interest in such
Global Securities (or the portion thereof indicated above); or

     [_] has requested the Trustee by written order to exchange or register the
transfer of a Definitive Security or Securities.

     In connection with such request and in respect of each such Security, the
Transferor does hereby certify that the Transferor is familiar with the
Indenture relative to the above captioned Securities and that the transfer of
this Security complies with any applicable blue sky securities laws of any state
of the United States and does not require registration under the Securities Act
(as defined below) because:*

     [_] Such Security is being acquired for the Transferor's own account
without transfer (in satisfaction of Section 2.06(a)(ii)(A) or Section
2.06(d)(i)(A) of the Indenture).

     [_] Such Security is being transferred (i) to a "qualified institutional
buyer" (as defined in Rule 144A under the Securities Act of 1933, as amended
(the "Securities Act")), in reliance on Rule 144A under the Securities Act or
(ii) pursuant to an exemption from registration in accordance with Rule 904
under the Securities Act (and in the case of clause (ii), based on an opinion of
counsel if the Company so requests and together with a certification in
substantially the form of Exhibit D to the Indenture).

     [_] Such Security is being transferred (i) in accordance with Rule 144
under the Securities Act (and based on an opinion of counsel if the Company so
requests) or (ii) pursuant to an effective registration statement under the
Securities Act.

     [_] Such Security is being transferred to an institutional "accredited
investor" within the meaning of Rule 501(a)(1), (2), (3) or (7) under the
Securities Act pursuant to a private placement exemption from the registration
requirements of the Securities Act (and based on an opinion of counsel if the
Company so requests) together with a certification in substantially the form of
Exhibit C to the Indenture.

                                      B-1
<PAGE>

     [_] Such Security is being transferred in reliance on and in compliance
with another exemption from the registration requirements of the Securities Act
(and based on an opinion of counsel if the Company so requests).

                                       ________________________________________
                                       [INSERT NAME OF TRANSFEROR]

                                       By:_____________________________________
                                       Name:
                                       Title:
                                       Address:

     Date:____________________

     _________________________

     *Check applicable blank or box.

                                      B-2
<PAGE>

                                   EXHIBIT C

                  FORM OF TRANSFEREE LETTER OF REPRESENTATION

             TO BE DELIVERED BY INSTITUTIONAL ACCREDITED INVESTORS

Varco International, Inc.

c/o ______________________

__________________________

__________________________

Dear Sirs:

     In connection with the proposed transfer to us of $ ___________ aggregate
principal amount of the 7 1/4% Notes due 2011 (the "Notes") of Varco
International, Inc., a Delaware corporation (the "Company"), we confirm that:

     1. We understand that the Notes have not been registered under the
Securities Act of 1933, as amended (the "Securities Act"), or other applicable
securities laws, and may not be offered, sold or otherwise transferred except as
permitted in the following sentence. We agree on our behalf and on behalf of any
investor account for which we are purchasing Notes to offer, sell or otherwise
transfer such Notes prior to the date which is two years after the later of the
date of original issue thereof and the last date on which the company or any
"affiliate" of the Company was the owner of such Notes (or any predecessor
thereto) (the "Resale Restriction Termination Date") only (a) to the Company,
(b) pursuant to a registration statement which has been declared effective under
the Securities Act, (c) so long as the Notes are eligible for resale pursuant to
Rule 144A under the Securities Act, to a person we reasonably believe is a
"Qualified Institutional Buyer" (a "QIB") as defined in Rule 144A under the
Securities Act that purchases for its own account or for the account of a QIB to
whom notice is given that the transfer is being made in reliance on rule 144A,
(d) pursuant to offers and sales to non-U.S.. Persons that occur outside the
United States within the meaning of Regulation S under the Securities Act, (e)
to an institutional "accredited investor" (an "Institutional Accredited
Investor") within the meaning of subparagraph (a)(1), (2), (3) or (7) of Rule
501 under the Securities Act that is acquiring the notes for its own account or
for the account of such an Institutional Accredited Investor for investment
purposes and not with a view to, or for offer or sale in connection with, any
distribution in violation of the Securities Act or (f) pursuant to any other
available exemption from the registration requirements of the Securities Act,
subject to the Company's and the Trustee's right prior to any such offer, sale
or transfer (i) pursuant to clause (d), (e) or (f) above to require the delivery
of an opinion of counsel, certifications and/or other information satisfactory
to each of them and (ii) in each of the foregoing cases to require that a
certificate of transfer in the form appearing in the indenture for the Notes is
completed and delivered by the transferor to the Trustee.

                                      C-1
<PAGE>

     2. We are an Institutional Accredited Investor purchasing for our own
account or for the account of an Institutional Accredited Investor over which we
exercise sole investment discretion for investment purposes and not with a view
to, or for offer or sale in connection with, any distribution in violation of
the Securities Act or any other applicable securities laws and we have such
knowledge and experience in financial and business matters as to be capable of
evaluating the merits and risks of our investment in the Notes, and we and any
accounts for which we are acting are each able to bear the economic risk of our
or its investment for an indefinite period.

     3. You are entitled to rely upon the acknowledgments, representations and
agreements set forth in this letter and you are irrevocably authorized to
produce this letter or a copy hereof to any interested party in any
administrative or legal proceeding or official inquiry with respect to the
matters covered hereby, and we agree to notify you promptly in writing if any of
our representations and warranties herein cease to be accurate and complete.

                                     Very truly yours,

                                     Name of Transferee: ___________________
                                     By: ___________________________________
                                     Date: _________________________________

     Upon transfer the Notes would be registered in the name of the new
beneficial owner as follows:

     Name: __________________________

     Address: ______________________________________________

     Taxpayer ID No:  _______________

                                      C-2
<PAGE>

                                   EXHIBIT D

               FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION

                    WITH TRANSFERS PURSUANT TO REGULATION S

                                                      _______________,____
________________________, as Registrar
Attention:  Corporate Trust Department

     Ladies and Gentlemen:

     In connection with our proposed sale of certain 7 1/4% Series [A/B] Notes
due 2011 (the "Securities") of Varco International, Inc., a Delaware corporation
(the "Company"), we represent that:

          (i)  the offer of the Securities was not made to a person in the
     United States;

         (ii)  at the time the buy order was originated, the transferee was
     outside the United States or we and any person acting on our behalf
     reasonably believed that the transferee was outside the United States;

        (iii)  no directed selling efforts have been made by us in the United
     States in contravention of the requirements of Rule 903(b) or Rule 904(b)
     of Regulation S under the U.S. Securities Act of 1933, as applicable; and

         (iv)  the transaction is not part of a plan or scheme to evade the
     registration requirements of the U.S. Securities Act of 1933.

     You and the Company are entitled to rely upon the acknowledgements,
representations and agreements set forth in this letter and you are irrevocably
authorized to produce this letter or a copy hereof to any interested party in
any administrative or legal proceedings or official inquiry with respect to the
matters covered hereby. Terms used in this certificate have the meanings set
forth in Regulation S under the U.S. Securities Act of 1933.

                                                     Very truly yours,

                                                     ___________________________
                                                     [Name]

                                                     By: _______________________
                                                     Name:
                                                     Title:
                                                     Address:

                                      D-1
<PAGE>

                                   EXHIBIT E

                        FORM OF SUPPLEMENTAL INDENTURE

     SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of
____________ between ____________________, a __________ corporation (the "New
Guarantor"), a subsidiary of Varco International, Inc., a Delaware corporation
(the "Company"), and [____________________], as trustee under the indenture
referred to below (the "Trustee"). Capitalized terms used herein and not defined
herein shall have the meaning ascribed to them in the Indenture (as defined
below).

                              W I T N E S S E T H

     WHEREAS, the Company has heretofore executed and delivered to the Trustee
an indenture (as amended or supplemented from time to time, the "Indenture"),
dated as of May 1, 2001, providing for the issuance of an aggregate principal
amount of $200,000,000 of 7 1/4% Senior Notes due 2011 (the "Notes");

     WHEREAS, Section 9.05 of the Indenture provides that under certain
circumstances the Company must cause certain of its subsidiaries to execute and
deliver to the Trustee a supplemental indenture pursuant to which such
subsidiaries shall unconditionally guarantee all of the Company's obligations
under the Notes pursuant to a Guarantee on the terms and conditions set forth
herein; and

     WHEREAS, pursuant to Section 9.05 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture;

     NOW, THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which are hereby acknowledged, the New
Guarantor and the Trustee mutually covenant and agree for the equal and ratable
benefit of the Holders of the Notes as follows:

     1. Capitalized Terms. Capitalized terms used herein without definition
shall have the meanings ascribed to them in the Indenture.

     2. Agreement to Guarantee. The New Guarantor hereby fully, unconditionally
and absolutely guarantees, jointly and severally with all other Guarantors, the
Company's obligations under the Notes and the Indenture on the terms and subject
to the conditions set forth in Article 9 of the Indenture and agrees to be bound
by all other applicable provisions of the Indenture.

     3. No Recourse Against Others. No past, present or future director,
officer, employee, incorporator, shareholder or agent of any Guarantor, as such,
shall have any liability for any obligations of the Company or any Guarantor
under the Notes, any Guarantees, the Indenture or this Supplemental Indenture or
for any claim based on, in respect of, or by reason of, such obligations or
their creation. Each Holder by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for issuance of
the Notes.
<PAGE>

     4. New York Law to Govern. The internal law of the State of New York shall
govern and be used to construe this Supplemental Indenture.

     5. Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

     6. Effect of Headings. The Section headings herein are for convenience only
and shall not affect the construction hereof.

     7. The Trustee. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental
Indenture or for or in respect of the correctness of the recitals of fact
contained herein, all of which recitals are made solely by the New Guarantor.

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed and attested, all as of the date first above
written.

Dated:  __________________                  [NAME OF NEW SUBSIDIARY GUARANTOR]

                                            By:________________________________
                                            Name:
                                            Title:

Dated:  __________________                  [____________________]
                                                       as Trustee

                                            By:________________________________
                                               Name:
                                               Title:
<PAGE>

SCHEDULE I
----------

                                     VARCO I/P, INC.

                                     TUBO-FGS, LLC

                                     TUBOSCOPE (HOLDING U.S.) INC.

                                     FIBER GLASS SYSTEMS HOLDINGS, LLC

                                     FIBER GLASS SYSTEMS, LP

                                     VARCO, LP

                                     QUALITY TUBING INC

                                     TUBOSCOPE PIPELINE SERVICES INC.

                                     ENVIRONMENTAL PROCEDURES INC.

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00027-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00027-of-00352.parquet"}]]