Document:

<PAGE>
                                                                    EXHIBIT 10qq

                                 NINTH AMENDMENT
                TO MASTER LEASE AGREEMENT AND EQUIPMENT SCHEDULES

      THIS NINTH AMENDMENT TO MASTER LEASE AGREEMENT AND EQUIPMENT SCHEDULES
("this Ninth Amendment") is made and entered into as of the 29th day of January,
2003, by BRUSH WELLMAN INC., an Ohio corporation (the "Lessee"), and NATIONAL
CITY BANK, a national banking association, for itself and as agent for certain
participants (the "Lessor").

                                    RECITALS:

      A. The Lessee and the Lessor entered into a Master Lease Agreement, dated
as of December 30, 1996, as amended by the First Amendment to Master Lease
Agreement, dated as of September 2, 1997, the Second Amendment to Master Lease
Agreement and Amendment to Disbursement Schedules, dated as of January 26, 1999,
the Third Amendment to Master Lease Agreement and Amendment to Equipment
Schedules, dated as of September 30, 1999, the Fourth Amendment to Master Lease
and Waiver, dated as of May 16, 2000, and Consolidated Amendment No.1 to Master
Lease Agreement and Equipment Schedules, dated as of June 30, 2000, Consolidated
Amendment No.2 to Master Lease Agreement and Equipment Schedules, dated as of
March 30, 2001, Consolidated Amendment No.3 to Master Lease Agreement and
Equipment Schedules, dated as of September 28, 2001, and an Eighth Amendment to
Master Lease Agreement and Equipment Schedules, dated as of December 31, 2001
(collectively, together with all Exhibits and Schedules thereto, the "Lease
Agreement"), under which the Lessor agreed to lease to the Lessee certain
equipment to be used by the Lessee at its Elmore, Ohio, facility, subject to
certain conditions and in accordance with the terms thereof.

      B. Capitalized terms used herein and not otherwise defined herein shall
have the

<PAGE>

      meanings assigned to such terms in the Lease Agreement.

      C. In addition, on November 30, 2002, a Default occurred and is continuing
under Section XI(a)(iii) (Default) of the Lease Agreement, by reference to
Section XXIII(d) (Consolidated Tangible Net Worth) thereof (the "Existing
Default"), and the Lessee has requested the Lessor to waive the Existing
Default.

      D. Subject to the terms and conditions of this Ninth Amendment, the Lessor
has agreed to waive the Existing Default. E. In addition, the Lessee has
requested the Lessor to authorize the Collateral Agent and the Collateral Agent
under the Intercreditor and Collateral Agency Agreement dated September 28,
2001, as amended (the "Collateral Agency Agreement"), on behalf of the Lessor,
to enter into an Intercreditor Agreement with The Bank of Nova Scotia in the
Form of Attachment 9 hereto (the "Scotia Intercreditor Agreement").

      F. In addition, the Lessor and the Lessee have agreed to amend the Lease
Agreement as hereinafter set forth.

                                  AGREEMENTS:

      NOW, THEREFORE, in consideration of the foregoing Recitals and the mutual
agreements hereinafter set forth, the parties hereby agree as follows:

      1. Amendments to the Lease Agreement. Subject to the terms and conditions
of this Ninth Amendment, including, without limitation, Section 4, below, the
Lease Agreement is hereby amended as follows:

      A. The following definitions are added to Paragraph (b) of Section XXV
(Definitions) of the Lease Agreement in proper alphabetical order:

            "COLLATERAL AGENCY AGREEMENT" shall mean that certain Intercreditor
      and Collateral Agency Agreement dated September 28, 2001, among National
      City Bank, as collateral

                                       2
<PAGE>

      agent, the Lessor, and certain other parties, as heretofore and hereafter
      amended, supplemented and replaced from time to time.

            "COLLATERAL AGENT" shall mean the party from time to time serving as
      the Collateral Agent under and pursuant to the Collateral Agency
      Agreement.

            "MORTGAGE" shall mean any mortgage or deed of trust in form and
      substance satisfactory to the Collateral Agent that grants to the
      Collateral Agent for the benefit of the Secured Creditors (as defined in
      the Collateral Agency Agreement) a Lien on real property owned by any
      Credit Party and on the Development Bond Sites, collectively being the
      "MORTGAGES".

            "SECURITY DOCUMENTS" shall mean the Guaranties, the Collateral
      Agency Agreement, the Security Agreement, the Subsidiary Security
      Agreement, the Mortgages and each other document pursuant to which any of
      the Obligations are guaranteed or any Lien or security interest is
      governed or granted by any Borrower or any Subsidiary to the Collateral
      Agent or the Collateral Agent as security for any of the Obligations.

            "SCOTIA INTERCREDITOR AGREEMENT" shall mean the Intercreditor
      Agreement among The Bank of Nova Scotia, the Collateral Agent and the
      Collateral Agent entered into contemporaneously with the effectiveness of
      the Ninth Amendment to this Agreement, as the same is amended,
      supplemented and replaced from time to time.

      B. The proviso at the end of the definition of "Consolidated Tangible Net
Worth" in Section XXV(b) (Definitions) of the Lease Agreement (that is, the
proviso immediately following the word "GAAP" and after the semicolon) is
amended and restated in its entirety to provide as follows:

      PROVIDED that Consolidated Tangible Net Worth shall be calculated (i)
      before the effect of FAS 133 - Accounting for Derivatives Instruments and
      Hedging Activities and FAS 138 - Accounting for Certain Derivatives
      Instruments and Certain Hedging Activities (prior to the "Delivery Date"
      of the Eighth Amendment to this Agreement, such item appearing under the
      stockholders' equity category "Foreign Currency Translation Adjustment"),
      (ii) without reduction for Directors Deferred Compensation (prior to the
      "Delivery Date" of the Eighth Amendment to this Agreement, such item
      appearing under the stockholders' equity categories "Other Equity
      Transactions - Deferred Directors Shares and Deferred Compensation"),
      (iii) without reflecting the effect of any write-offs of any deferred tax
      assets effected during the fiscal year of Brush Engineered Materials Inc.
      ending December 31, 2002, pursuant to FAS 109, so long as such write-offs
      do not exceed $25,000,000 in the aggregate on a consolidated basis, and
      (iv) without reflecting the effect of any non-cash charges in respect of
      unfunded pension liabilities effected during the fiscal year of Brush
      Engineered Materials Inc. ending December 31, 2002, pursuant to FAS 87, so
      long as such charges do not exceed $18,000,000 in the aggregate on a
      consolidated basis.

                                       3
<PAGE>

      C. Paragraph (b) of Section XXIII of the Lease Agreement (Ratio of
Consolidated Total Debt to Consolidated EBITDAR) is amended and restated in its
entirety to provide as follows:

      (b) RATIO OF CONSOLIDATED TOTAL DEBT TO CONSOLIDATED EBITDAR. Lessee will
not permit the ratio at any time of (x) the amount of Consolidated Total Debt at
such time to (y) Consolidated EBITDAR for the Testing Period most recently
ended, to exceed (i) 3.50 to 1.00 for each Testing Period ending on and after
March 31, 2003; provided, however, that for the purposes of this paragraph (a),
(A) the term "Testing Period" shall mean, as to each of the fiscal quarters
ending on the following dates only, the respective period set forth opposite
such fiscal quarter:

<TABLE>
<CAPTION>
      Fiscal Quarter Ending  Testing Period
      ---------------------  --------------

<S>                          <C>
      March 31, 2003         October 1, 2002 through March 31, 2003, and
      June 30, 2003          October 1, 2002 through June 30, 2003
</TABLE>

      and (B) in computing such ratio for the Testing Period ending March 31,
      2003, Consolidated EBITDAR shall be deemed to mean an amount equal to
      Consolidated EBITDAR for such Testing Period, times two (2); and, in
      computing such ratio for the Testing Period ending June 30, 2003,
      Consolidated EBITDAR shall be deemed to mean an amount equal to
      Consolidated EBITDAR for such Testing Period, times one and one-third
      (1 1/3)

      D. Paragraph (c) of Section XXIII (Consolidated Fixed Charge Coverage
Ratio) of the Lease Agreement is amended and restated in its entirety to provide
as follows:

            (c) CONSOLIDATED FIXED CHARGE COVERAGE RATIO. The Lessee will not at
      any time permit the Consolidated Fixed Charge Coverage Ratio for any of
      the Testing Periods set forth below to be less than the ratio set forth
      opposite such Testing Period:

<TABLE>
<CAPTION>
      Fiscal Quarter Ending              Minimum Fixed Charge Coverage Ratio
      ---------------------              -----------------------------------

<S>                                      <C>
      March 31, 2003                     1.25 to 1.00
      June 30, 2003 and thereafter       1.50 to 1.00;
</TABLE>

      provided, however, that for the purposes of this Section XXIII(c), the
      term "Testing Period" shall mean, as to each of the fiscal quarters ending
      on the following dates only, the respective period set forth opposite such
      fiscal quarter:

<TABLE>
<CAPTION>
      Fiscal Quarter Ending  Testing Period
      ---------------------  --------------

<S>                          <C>
      March 31, 2003         October 1, 2002 through March 31, 2003, and
      June 30, 2003          October 1, 2002 through June 30, 2003.
</TABLE>

      E. Paragraph (d) of Section XXIII (Consolidated Tangible Net Worth) of the
Lease

                                       4
<PAGE>

Agreement is amended and restated in its entirety to provide as
follows:

            (d) CONSOLIDATED TANGIBLE NET WORTH. The Lessee will not permit the
      Consolidated Tangible Net Worth to be less than $185,000,000 as of
      December 31, 2002 or at any time thereafter.

      F. The following provisions are added as new Sections XXIV(w) and XXIV(x)
of the Lease Agreement immediately following Section XXIV(v) and before Section
XXV:

            (w) ENVIRONMENTAL SITE ASSESSMENTS. No later than March 31, 2003,
      the Lessee shall deliver to the Collateral Agent a Phase I environmental
      site assessment in respect of each real property site encumbered by the
      Mortgages. Such site assessments shall be conducted by qualified
      environmental consultants of recognized standing reasonably approved by
      the Collateral Agent and shall be in form and content reasonably
      satisfactory to the Collateral Agent.

            (x) SURVEYS. No later than March 31, 2003, the Lessee shall deliver
      to the Collateral Agent an ALTA/ACSM survey in respect of each real
      property site encumbered by the Mortgages (unless, as to the Delta, Utah
      site of Brush Resources, Inc. only, waived by the Collateral Agent, in its
      discretion). Such surveys shall be conducted and prepared by qualified and
      licensed surveyors of recognized standing reasonably approved by the
      Collateral Agent and shall be in form and content reasonably satisfactory
      to the Collateral Agent.

      G. The definition of Applicable Margin contained in Exhibit No. 2
Equipment Schedules is amended and restated in its entirety to provide as
follows:

      "Applicable Margin" shall mean Four Hundred Fifty (450) basis points.

      2. Conditional Waiver.

      A. Subject to the terms and conditions of this Ninth Amendment, including,
without limitation, Section 4, below, the Lessor hereby waives the Lessee's
breach, as of November 30, 2002, of the covenant contained in Section XXIII(d)
(Consolidated Tangible Net Worth) of the Lease Agreement (and the resulting
Existing Default), but only to the extent that the Consolidated Tangible Net
Worth as of such date was not less than $198,000,000.

      B. The foregoing waiver is limited to its express terms and shall not be
deemed to be a waiver of any other Default

                                       5
<PAGE>

which may have existed on or prior to the date hereof or any Default which may
hereafter arise under any of the foregoing Section or under any other provision
of the Lease Agreement or any of the other Lease Documents. Further, the
granting of this waiver shall not be construed as an agreement or understanding
by the Lessor to grant any other waiver or other accommodation in the future
with respect to the foregoing Section or any other provision of the Lease
Agreement or any of the other Lease Documents.

      3. Authorization. Subject to the terms and conditions of this Ninth
Amendment, including, without limitation, Section 4, below, in accordance with
Section 8.4 of the Collateral Agency Agreement, the Lessor hereby authorizes the
Collateral Agent, on behalf of the Lessor, to enter into the Scotia
Intercreditor Agreement.

      4. Delivery Date; Conditions Precedent. The modifications to the Lease
Agreement set forth in Section 1, above, the waiver set forth in Section 2,
above, and the authorization set forth in Section 3, above, are subject to the
Lessee's performance of the following (the date on which all have been performed
being the "Delivery Date"):

      A. The Lessee's secretary or treasurer shall have certified to the Lessor
(i) a copy of the resolutions duly adopted by the Lessee's board of directors in
respect of this Amendment and the other Lease Documents contemplated hereby;
(ii) true and correct copies of the Lessee's current Charter or Articles of
Incorporation and By-laws or Code of Regulations (or, if applicable, that no
modifications thereof have been made since they were most recently certified to
the Lessor); (iii) the names and true signatures of the officers of the Lessor
authorized to sign this Ninth Amendment and any Mortgage required hereby on
behalf of the Lessor; (iv) that, after giving effect to the amendments set forth
herein, no Default or Potential Default exists; and (v) that the representations
and warranties of the Lessee under the Lease Agreement are reaffirmed as of the
Delivery Date, subject only to variance therefrom acceptable to the Collateral
Agent.

                                       6
<PAGE>

      B. Each Guarantor's secretary or treasurer shall have certified to the
Lessor (i) a copy of the resolutions duly adopted by that Guarantor's board of
directors in respect of this Amendment and the other Lease Documents
contemplated hereby; (ii) true and correct copies of that Guarantor's current
Charter or Articles of Incorporation and By-laws or Code of Regulations (or, if
applicable, that no modifications thereof have been made since they were most
recently certified to the Lessor); (iii) the names and true signatures of the
officers of that Guarantor authorized to sign this Amendment and any Mortgage
required hereby on behalf of that Guarantor; and (iv) that, after giving effect
to the amendments set forth herein, no Default exists.

      C. Counsel to the Lessee and the Guarantors shall have delivered to the
Lessor a written opinion as to the due authorization, execution, delivery and
enforceability of this Ninth Amendment and the other documents described in
paragraphs E through J, inclusive, of this Section 4, in form and substance
satisfactory to the Collateral Agent; provided that no opinion with respect to
the enforceability of any document described in paragraph F below shall be
required.

      D. The Lessee shall have paid to the Collateral Agent in immediately
available funds, for the ratable benefit of the Lessor, an amendment fee in the
amount of Eighty-four Thousand Five Hundred Thirty-six Dollars ($84,536).

      E. All of the parties to the Collateral Agency Agreement shall have
executed and delivered to Collateral Agent a Second Amendment to Intercreditor
and Collateral Agency Agreement in the form of Attachment 1 hereto.

      F. The Lessee and each Guarantor (including new Guarantors pursuant to
Paragraph I, below) that owns real property or holds a leasehold interest in a
Development Bond Site (said real property and the Development Bond Sites being,
collectively, the "Mortgaged Property") shall have executed and delivered to the
Collateral Agent a Mortgage substantially in the form of Attachment

                                       7
<PAGE>

2 hereto (as to the Lessee) or Attachment 3 hereto (as to a Guarantor) on all
Mortgaged Property owned by the Lessee or such Guarantor or in which the Lessee
or such Guarantor holds a leasehold interest, shall have taken or caused to be
taken such other actions, if any, as the Collateral Agent may reasonably deem
necessary or appropriate to cause the Collateral Agent's Lien on the Mortgaged
Property to be duly perfected and subject only to such matters as are approved
by the Collateral Agent, and shall have accompanied each such Mortgage with an
ALTA loan policy of title insurance in form and substance reasonably
satisfactory to the Collateral Agent; provided, however, that no such Mortgage
shall encumber any Mortgaged Property if the grant of such Mortgage would cause
a default under, or accelerate the maturity of indebtedness secured by, any
mortgage, deed of trust, ground lease or other lien or lease instrument that
encumbers such Mortgaged Property on the Effective Date (each a "Prior
Encumbrance") until such time as the Lessee or such Guarantor, as applicable,
has obtained the consent of the holder of such Prior Encumbrance; provided
further that the Lessee shall, or shall cause such Guarantor to use its best
efforts (subject to commercial reasonableness) to obtain such consent promptly
following the Effective Date.

      G. Each of the existing Guarantors shall have executed a confirmation of
its Guaranty in the form of Attachment 4 hereto.

      H. The Lessee and the Parent shall have executed and delivered to the
Collateral Agent an amendment to the Security Agreement in the form of
Attachment 5 hereto; and each of the other Guarantors shall have executed and
delivered to the Collateral Agent an amendment to the Subsidiary Lease Security
Agreement in the form of Attachment 6 hereto.

      I. Each of BEM Services, Inc; Zentrix Technologies Inc.; Brush
International, Inc.; Williams Advanced Materials Inc.; Circuits Processing
Technologies, Inc.; Technical Materials, Inc.; and Williams Acquisition, LLC
shall have executed and delivered to the Collateral Agent a

                                       8
<PAGE>

Guaranty (substantially in the form of the Guaranties) and shall have joined in
the Subsidiary Lease Security Agreement as an "Assignor" thereunder pursuant to
a joinder in the form of Attachment 7 hereto.

      J. All of the parties to the Credit Agreement shall have executed and
delivered an amendment thereto in form and substance satisfactory to the Lessor,
and all conditions to its effectiveness shall have been satisfied.

      K. The Lessee shall have delivered or caused to be delivered such other
documents as Collateral Agent or the Lessor may reasonably request.

      5. No Other Modifications. Except as expressly provided in this Ninth
Amendment, all of the terms and conditions of the Lease Agreement remain
unchanged and in full force and effect.

      6. Governing Law; Binding Effect. This Ninth Amendment shall be governed
by and construed in accordance with the laws of the State of Ohio and shall be
binding upon and inure to the benefit of the Lessee, the Lessor, and their
respective successors and assigns.

      7. Counterparts. This Ninth Amendment may be executed in separate
counterparts, each of which shall be deemed to be an original, and all of which
together shall be deemed a fully executed agreement.

      8. Miscellaneous.

      A. The Lessee agrees to pay on demand all costs and expenses of the
Lessor, including reasonable attorneys' fees and expenses, incurred in
connection with the preparation, execution and delivery of this Ninth Amendment
and the other documents contemplated hereby, including, without limitation, the
Second Amendment to Intercreditor and Collateral Agency Agreement.

      B. This Ninth Amendment is executed in accordance with and subject to
Section XIX(g) of the Lease Agreement. The execution, delivery and performance
by the Lessor of this Ninth

                                       9
<PAGE>

Amendment shall not constitute, or be deemed to be or construed as, a waiver of
any right, power or remedy of the Lessor or a waiver of any provision of the
Lease Agreement, except as expressly stated herein. None of the provisions of
this Ninth Amendment shall constitute, or be deemed to be or construed as, a
wavier of any Default or Potential Default.

      IN WITNESS WHEREOF, the Lessee, the Lessor and its participants have
hereunto set their hands as of the date first above written.

LESSEE:                               LESSOR:
------                                ------

BRUSH WELLMAN INC.                    NATIONAL CITY BANK,
                                      FOR ITSELF AND AS AGENT FOR
                                      CERTAIN PARTICIPANTS

By: _______________________________   By: _______________________________
                                          Janice E. Focke, Senior Vice President
   ________________, ______________

                                       10
<PAGE>

THE FOREGOING AMENDMENT is hereby acknowledged, consented and agreed to by each
of the undersigned by their respective duly authorized officers as of the day
and year first above written.

Address:                                  FIFTH  THIRD  BANK,  an Ohio  banking
                                          corporation, f/k/a Fifth Third Bank,
                                          Northeastern Ohio
         1404 East Ninth Street
         Cleveland, Ohio 44114
         Fax: (216) 274-5507              By:  _______________________________

                                          Title:  ______________________________

Address:                                  HARRIS TRUST AND SAVINGS BANK

         P.O. Box 755 (111/10W)
         Chicago, IL 60690-0755
         Fax: (312) 461-5225              By:_________________________________

                                          Title:  ______________________________

Address:                                  U.S. BANK NATIONAL ASSOCIATION,
                                          f/k/a Firstar Bank, N.A.

         P.O. Box 524
         Mailcode SL-TW-07CP
         St. Louis, MO 63166-0524
         Fax: (314) 418-2135              By: ________________________________

                                          Title:   _____________________________

Address:                                  LASALLE NATIONAL LEASING
                                          CORPORATION

         One West Pennsylvania Avenue
         Suite 1000                       By: ________________________________
         Towson, Maryland 21204
         Fax: (410) 769-9313              Title: _______________________________

Address:                                  MANUFACTURERS AND TRADERS
                                          TRUST COMPANY
         One Foundation Plaza
         Buffalo, New York 14203          By:  ________________________________
         Fax: (716) 848-7318
                                          Title:  ______________________________

                                       11<PAGE>
                                                                    EXHIBIT 10rr

                                 TENTH AMENDMENT
                TO MASTER LEASE AGREEMENT AND EQUIPMENT SCHEDULES

         THIS TENTH AMENDMENT TO MASTER LEASE AGREEMENT AND EQUIPMENT SCHEDULES
("this Tenth Amendment") is made and entered into as of the 7th day of March,
2003, by BRUSH WELLMAN INC., an Ohio corporation (the "Lessee"), and NATIONAL
CITY BANK, a national banking association, for itself and as agent for certain
participants (the "Lessor").

                                    RECITALS:

         A. The Lessee and the Lessor entered into a Master Lease Agreement,
dated as of December 30, 1996, as amended by the First Amendment to Master Lease
Agreement, dated as of September 2, 1997, the Second Amendment to Master Lease
Agreement and Amendment to Disbursement Schedules, dated as of January 26, 1999,
the Third Amendment to Master Lease Agreement and Amendment to Equipment
Schedules, dated as of September 30, 1999, the Fourth Amendment to Master Lease
and Waiver, dated as of May 16, 2000, and Consolidated Amendment No.1 to Master
Lease Agreement and Equipment Schedules, dated as of June 30, 2000, Consolidated
Amendment No.2 to Master Lease Agreement and Equipment Schedules, dated as of
March 30, 2001, Consolidated Amendment No.3 to Master Lease Agreement and
Equipment Schedules, dated as of September 28, 2001, an Eighth Amendment to
Master Lease Agreement and Equipment Schedules, dated as of December 31, 2001,
and a Ninth Amendment to Master Lease Agreement and Equipment Schedules, dated
as of January 29, 2003 (collectively, together with all Exhibits and Schedules
thereto, the "Lease Agreement"), under which the Lessor agreed to lease to the
Lessee certain equipment to be used by the Lessee at its Elmore, Ohio, facility,
subject to certain conditions and in accordance with the terms thereof.
<PAGE>

         B. Capitalized terms used herein and not otherwise defined herein shall
have the meanings assigned to such terms in the Lease Agreement.

         C. The Lessor and the Lessee have agreed to amend the Lease Agreement
as hereinafter set forth.

                                   AGREEMENTS:

         NOW, THEREFORE, in consideration of the foregoing Recitals and the
mutual agreements hereinafter set forth, the parties hereby agree as follows:

         1. Amendments to the Lease Agreement. Subject to the terms and
conditions of this Tenth Amendment, including, without limitation, Section 2,
below, the Lease Agreement is hereby amended as follows:

         A. The clauses designated as "(i)" and "(ii)" of Paragraph (iv) of
Section XI(a) of the Lease Agreement (Default) are re-designated to be "(A)" and
"(B)"; respectively, and the following provision is added to the end of said
Paragraph (iv) as a new clause (C) thereof:

         or (C) there shall occur an "Event of Default" as that term is defined
         and used in the Credit Agreement,

         B. Paragraph (ix) of Section XI(a) of the Lease Agreement (Default) is
amended by deleting therefrom the sum "$5,000,000" and inserting the sum
"$1,000,000" in its stead.

         C. Paragraph (a) of Section XXIII of the Lease Agreement (Ratio of
Consolidated Total Debt to Consolidated Total Adjusted Capital and Interest
Coverage Ratio) is amended and restated in its entirety to provide as follows:

             (a) INTEREST COVERAGE RATIO. The Lessee shall not permit the
         Interest Coverage Ratio for the Testing Period ending on any of the
         following dates to be less than the ratio set forth below opposite such
         date:

                                       2
<PAGE>
<TABLE>
<CAPTION>

         Testing Period Ending                       Minimum Ratio
         ---------------------                       -------------
<S>                                                  <C>
         June 30, 2003                                1.20 to 1
         September 30, 2003                           1.25 to 1
         December 31, 2003                            1.35 to 1
         March 31, 2004                               1.50 to 1;
</TABLE>

                  provided, however, that for the purposes of this Paragraph (a)
         only, in computing the Interest Coverage Ratio for the Testing Period
         ending June 30, 2003, Consolidated EBITDAR shall be deemed to mean an
         amount equal to Consolidated EBITDAR for the period January 1, 2003
         through June 30, 2003, times two (2); and, in computing the Interest
         Coverage Ratio for the Testing Period ending September 30, 2003,
         Consolidated EBITDAR shall be deemed to mean an amount equal to
         Consolidated EBITDAR for the period January 1, 2003 through September
         30, 2003, times one and one-third (1 1/3).

         D. Paragraph (b) of Section XXIII of the Lease Agreement (Ratio of
Consolidated Total Debt to Consolidated EBITDAR) is amended and restated in its
entirety to provide as follows:

            (b) RATIO OF CONSOLIDATED TOTAL DEBT TO CONSOLIDATED EBITDAR.
         The Lessee shall not permit the ratio of (i) the amount of Consolidated
         Total Debt as of the end of any Testing Period ending on and after
         December 31, 2003 to (ii) Consolidated EBITDAR for such Testing Period,
         to exceed 5.00 to 1.

         E. Paragraph (c) of Section XXIII (Consolidated Fixed Charge Coverage
Ratio) of the Lease Agreement is amended and restated in its entirety to provide
as follows:

            (c) MINIMUM EBITDAR. The Lessee shall not at any time permit
         the Consolidated EBITDAR for the Testing Period ending on any of the
         following dates to be less than the amount set forth opposite such
         date:

<TABLE>
<CAPTION>
         Testing Period Ending              Minimum EBITDAR
         ---------------------              ---------------
<S>                                         <C>
         March 31, 2003                     $ 8,500,000
         June 30, 2003                      $10,500,000
         September 30, 2003                 $14,000,000
         December 31, 2003                  $22,000,000
         March 31, 2004                     $24,000,000.
</TABLE>

         F. Paragraph (d) of Section XXIII (Consolidated Tangible Net Worth) of
the Lease Agreement is amended and restated in its entirety to provide as
follows:

            (d) CONSOLIDATED TANGIBLE NET WORTH. The Lessee shall not permit the
         Consolidated Tangible Net Worth to be less than (i) $185,000,000 as of
         December 31, 2002
                                       3
<PAGE>

         or (ii) $180,000,000 at any time thereafter.

         G. Paragraph (b) of Section XXIV(m) of the Lease Agreement
(Acquisitions) is amended and restated in its entirety to provide as follows:

            (b) ACQUISITIONS. [Intentional Deleted].

         H. Clause (A) of Paragraph (c) of Section XXIV(m) of the Lease
Agreement (Permitted Dispositions) is amended and restated in its entirety to
provide as follows:

            (A) the consideration for such transaction represents fair
         value (as determined by management of the Parent and approved by the
         Lessor in writing, which approval shall not be withheld or delayed
         unreasonably), and at least 90% of such consideration consists of cash
         (with any instrument evidencing any deferred portion of consideration
         being deposited in pledge with the Collateral Agent pursuant to, as the
         case may be, the Security Agreement or the Subsidiary Security
         Agreement),

         I. Paragraph (e) of Section XXIV(m) of the Lease Agreement (Capital
Expenditures) is amended and restated in its entirety to provide as follows:

            (e) CAPITAL EXPENDITURES. The Parent, the Lessee and the
         Subsidiaries shall not make any Consolidated Capital Expenditure if,
         after giving effect to such Consolidated Capital Expenditure, the
         aggregate of all Consolidated Capital Expenditures made (i) during the
         fiscal year of the Parent ending December 31, 2003 would exceed
         $10,000,000 or (ii) during the fiscal quarter ending March 31, 2004
         would exceed $3,000,000.

         J. Paragraph (j) of Section XXIV(o) of the Lease Agreement (Additional
Unsecured Debt of the Parent and Lessee) is amended by deleting therefrom the
sum "$5,000,000" and inserting therein the sum "$3,000,000" in its stead.

         K. Paragraph (e) of Section XXIV(p) of the Lease Agreement (Advances,
Investments, Loans and Guaranty Obligations) is amended and restated in its
entirety to provide as follows:

            (e) the loans, advances, investments and guarantees in respect
         of Indebtedness of persons other than Wholly-Owned Subsidiaries of the
         Parent or the Lessee on the date of the Fifth Amendment to the Credit
         Agreement and described in Annex V to the Credit Agreement and any
         refinancing, extension, renewal or refunding thereof;

         L. Paragraph (k) of Section XXIV(p) of the Lease Agreement (Advances,
Investments,

                                       4
<PAGE>
Loans and Guaranty Obligations) is amended by deleting therefrom the sum
"$10,000,000" and inserting therein the sum "$1,000,000" in its stead.

         M. The following provision is added as a new Section XXIV(y) of the
Lease Agreement immediately following Section XXIV(x) and before Section XXV:

            (y) CONSULTANT ACCESS. The Lessee hereby agrees to instruct
         and authorize, and to cause the Parent and each Subsidiary to instruct
         and authorize, FTI Consultants, Inc. (the "Consultant") to provide to
         the Lessor, promptly upon the request of the Lessor, true and complete
         copies of such reports, analyses and other information relating to any
         one or more of the Lessee, the Parent and the Subsidiaries, or
         otherwise arising from or in connection with such Consultant's
         engagement, as the Lessor may from time to time reasonably request and
         to discuss with the Lessor, promptly upon the written request of the
         Lessor to the Consultant (with a copy of any such notice to the
         Parent), all aspects of the business and property of any one or more of
         the Lessee, the Parent and the Subsidiaries and all of the Consultant's
         findings, opinions and conclusions, whether tentative or final;
         PROVIDED that the Lessee, the Parent or the Subsidiaries (as the case
         may be) potentially affected by any such discussions, shall be entitled
         to have one or more representatives present to observe such
         discussions.

         N. The definition of "Permitted Master Copper Lease Agreements" in
Section XXV of the Lease Agreement (Certain Definitions) is amended by deleting
therefrom the words and sum "an amount greater than $15,000,000" and inserting
therein the sum "$10,000,000" in their stead.

         O. The definition of "Permitted Precious Metal Consignments" in Section
XXV of the Lease Agreement (Certain Definitions) is amended by deleting
therefrom the sum "$70,000,000" and inserting therein the sum "$50,000,000" in
its stead.

         2. Delivery Date; Conditions Precedent. The modifications to the Lease
Agreement set forth in Section 1, above, are subject to the Lessee's performance
of the following (the date on which all have been performed being the "Delivery
Date"):

         A. The Lessee's secretary or treasurer shall have certified to the
Lessor (i) a copy of the resolutions duly adopted by the Lessee's board of
directors in respect of this Amendment and the other Lease Documents
contemplated hereby; (ii) true and correct copies of the Lessee's current

                                       5
<PAGE>

Charter or Articles of Incorporation and By-laws or Code of Regulations (or, if
applicable, that no modifications thereof have been made since they were most
recently certified to the Lessor); (iii) the names and true signatures of the
officers of the Lessee authorized to sign this Tenth Amendment on behalf of the
Lessee; (iv) that, after giving effect to the amendments set forth herein, no
Default or Potential Default exists; and (v) that the representations and
warranties of the Lessee under the Lease Agreement are reaffirmed as of the
Delivery Date, subject only to variance therefrom acceptable to the Lessor.

         B. Each Guarantor's secretary or treasurer shall have certified to the
Lessor (i) a copy of the resolutions duly adopted by that Guarantor's board of
directors in respect of this Amendment and the other Lease Documents
contemplated hereby; (ii) true and correct copies of that Guarantor's current
Charter or Articles of Incorporation and By-laws or Code of Regulations (or, if
applicable, that no modifications thereof have been made since they were most
recently certified to the Lessor); (iii) the names and true signatures of the
officers of that Guarantor authorized to sign any Mortgage amendment and other
Lease Documents required hereby on behalf of that Guarantor; and (iv) that,
after giving effect to the amendments set forth herein, no Default exists.

         C. Counsel to the Lessee and the Guarantors shall have delivered to the
Lessor a written opinion as to the due authorization, execution, delivery and
enforceability of this Tenth Amendment and the other documents described in
paragraphs E, through H, inclusive, of this Section 2, in form and substance
satisfactory to the Lessor; provided that no opinion with respect to the
enforceability of any document described in paragraph E below shall be required.

         D. The Lessee shall have paid to the Lessor in immediately available
funds, for the ratable benefit of the Lessor and its participants, an amendment
fee in the amount of One Hundred Ninety-three Thousand Two Hundred Eighty-five
Dollars ($193,285).

                                       6
<PAGE>

         E. Each Guarantor that has granted to the Collateral Agent a Mortgage
shall have executed and delivered to the Collateral Agent an amendment to such
Mortgage in the form of Attachment 1 hereto and shall, at the Lessee's expense,
accompany such amendment with an endorsement to the ALTA loan policy of title
insurance in respect of such Mortgage in form and substance reasonably
satisfactory to the Collateral Agent.

         F. Each of the Guarantors shall have executed a confirmation of its
Guaranty and of, as the case may be, the Security Agreement or Subsidiary Lease
Security Agreement in the form of Attachment 2 hereto.

         G. Brush International, Inc. shall have executed and delivered to the
Lessor a confirmation of the Foreign Subsidiary Pledge Agreement in the form of
Attachment 3 hereto.

         H. All of the parties to the Collateral Agency Agreement shall have
executed and delivered to Lessor a Third Amendment to Intercreditor and
Collateral Agency Agreement in the form of Attachment 4 hereto.

         I. All of the parties to the Credit Agreement shall have executed and
delivered an amendment thereto in form and substance satisfactory to the Lessor,
and all conditions to its effectiveness shall have been satisfied.

         J. The Lessee shall have delivered or caused to be delivered such other
documents as Collateral Agent or the Lessor may reasonably request.

         3. No Other Modifications. Except as expressly provided in this Tenth
Amendment, all of the terms and conditions of the Lease Agreement remain
unchanged and in full force and effect.

         4. Governing Law; Binding Effect. This Tenth Amendment shall be
governed by and construed in accordance with the laws of the State of Ohio and
shall be binding upon and inure to

                                       7
<PAGE>

the benefit of the Lessee, the Lessor, and their respective successors and
assigns.

         5. Counterparts. This Tenth Amendment may be executed in separate
counterparts, each of which shall be deemed to be an original, and all of which
together shall be deemed a fully executed agreement.

         6. Miscellaneous.

         A. The Lessee agrees to pay on demand all costs and expenses of the
Lessor, including reasonable attorneys' fees and expenses, incurred in
connection with the preparation, execution and delivery of this Tenth Amendment
and the other documents contemplated hereby, including, without limitation, the
Third Amendment to Intercreditor and Collateral Agency Agreement.

         B. This Tenth Amendment is executed in accordance with and subject to
Section XIX(g) of the Lease Agreement. The execution, delivery and performance
by the Lessor of this Tenth Amendment shall not constitute, or be deemed to be
or construed as, a waiver of any right, power or remedy of the Lessor or a
waiver of any provision of the Lease Agreement, except as expressly stated
herein. None of the provisions of this Tenth Amendment shall constitute, or be
deemed to be or construed as, a wavier of any Default or Potential Default.

          [No additional provisions are on this page; the next page is
                              the signature page.]

                                       8
<PAGE>
         IN WITNESS WHEREOF, the Lessee, the Lessor and its participants have
hereunto set their hands as of the date first above written.

LESSEE:                                    LESSOR:
------                                     ------

BRUSH WELLMAN INC.                         NATIONAL CITY BANK,
                                           FOR ITSELF AND AS AGENT FOR
                                           CERTAIN PARTICIPANTS

By: _______________________________        By:  _______________________________

   ----------------, --------------             ----------------, --------------

                                       9
<PAGE>

THE FOREGOING AMENDMENT is hereby acknowledged, consented and agreed to by each
of the undersigned by their respective duly authorized officers as of the day
and year first above written.

Address:                                 FIFTH THIRD BANK, an Ohio banking
                                         corporation,  f/k/a Fifth Third Bank,
                                         Northeastern Ohio
         1404 East Ninth Street
         Cleveland, Ohio 44114
         Fax: (216) 274-5507             By:  _______________________________

                                         Title:  ______________________________

Address:                                 HARRIS TRUST AND SAVINGS BANK

         P.O. Box 755 (111/10W)
         Chicago, IL 60690-0755
         Fax:     (312) 461-5225         By:_________________________________

                                         Title:  ______________________________

Address:                                 U.S. BANK NATIONAL ASSOCIATION,
                                         f/k/a Firstar Bank, N.A.
         P.O. Box 524
         Mailcode SL-TW-07CP
         St. Louis, MO 63166-0524
         Fax: (314) 418-2135             By: ________________________________

                                         Title:   ______________________________

Address:                                 LASALLE NATIONAL LEASING CORPORATION

         One West Pennsylvania Avenue
         Suite 1000                      By: ________________________________
         Towson, Maryland 21204
         Fax: (410) 769-9313             Title: _______________________________

Address:                                 MANUFACTURERS AND TRADERS
                                         TRUST COMPANY
         One Foundation Plaza
         Buffalo, New York 14203         By:  ________________________________
         Fax: (716) 848-7318
                                         Title:  ______________________________

                                       10

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