Document:

<PAGE>

                                                                     Exhibit 4.8

                          FIFTH SUPPLEMENTAL INDENTURE

         FIFTH SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as
of April 4, 2002, among Columbus McKinnon Corporation, a New York corporation,
the Guarantors (as defined in the Indenture referred to herein) and State Street
Bank and Trust Company, N.A., as trustee under the indenture referred to herein
(the "Trustee").

                               W I T N E S S E T H

         WHEREAS, the Company has heretofore executed and delivered to the
Trustee an Indenture (the "Original Indenture"), dated as of March 31, 1998
providing for the issuance of an aggregate principal amount of up to $300.0
million of 8 1/2% Senior Subordinated Notes due 2008 (the "Notes");

         WHEREAS, the Company, the Guarantors and the Trustee amended the
Original Indenture by entering into a Supplemental Indenture dated as of March
31, 1998, a Second Supplemental Indenture dated as of February 12, 1999, a Third
Supplemental Indenture dated as of March 1, 1999 and a Fourth Supplemental
Indenture dated as of November 1, 1999 in order to add certain entities as
guarantors and to reflect the merger or disposition of certain Guarantors (the
Original Indenture, as supplemented by the First Supplemental Indenture, the
Second Supplemental Indenture, the Third Supplemental Indenture and the Fourth
Supplemental Indenture, the "Indenture"); and

         WHEREAS, Section 9.02 of the Indenture provides that the Company, the
Guarantors and the Trustee may amend or supplement the Indenture with the
consent of the Holders of at least a majority in principal amount of the Notes
then outstanding; and

         WHEREAS, the Company, the Guarantors and the Trustee desire to amend
the Indenture as set forth in Section 2 hereof; and

         WHEREAS, the Company has received consents to the amendments effected
by this Fifth Supplemental Indenture from the Holders of at least a majority in
principal amount of the Notes outstanding; and

         WHEREAS, this Fifth Supplemental Indenture has been duly authorized by
all necessary corporate action on the part of the Company and the Guarantors;
and

         WHEREAS, all conditions precedent provided for in the Indenture
relating to this Fifth Supplemental Indenture have been complied with;

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

<PAGE>

         1. CAPITALIZED TERMS. Capitalized terms used herein without definition
shall have the meanings assigned to them in the Indenture.

         2. AMENDMENT TO INDENTURE. Section 5.01 of the Indenture is amended and
restated in its entirety to read as follows:

         "SECTION 5.01. MERGER, CONSOLIDATION, OR SALE OF ASSETS

            (a) Neither the Company nor any Guarantor shall consolidate or merge
with or into (whether or not the Company or such Guarantor is the surviving
corporation), nor shall the Company sell, assign, transfer, lease, convey or
otherwise dispose of all or substantially all of its properties or assets in one
or more related transactions, to another corporation, Person or entity unless
(i) the Company or such Guarantor is the surviving corporation or the entity or
the Person formed by or surviving any such consolidation or merger (if other
than the Company or such Guarantor) or to which such sale, assignment, transfer,
lease, conveyance or other disposition shall have been made is a corporation
organized or existing under the laws of the United States, any state thereof or
the District of Columbia; (ii) the entity or Person formed by or surviving any
such consolidation or merger (if other than the Company or such Guarantor) or
the entity or Person to which such sale, assignment, transfer, lease, conveyance
or other disposition shall have been made assumes all the obligations of the
Company under the Notes and this Indenture pursuant to a supplemental indenture
in a form reasonably satisfactory to the Trustee and under the Registration
Rights Agreement; (iii) immediately after such transaction no Default or Event
of Default exists; and (iv) except in the case of a merger of the Company with
or into a Wholly Owned Subsidiary of the Company, the Company or the entity or
Person formed by or surviving any such consolidation or merger (if other than
the Company or such Guarantor), or to which such sale, assignment, transfer,
lease, conveyance or other disposition shall have been made (a) shall have
Consolidated Net Worth immediately after the transaction equal to or greater
than the consolidated net worth of the Company immediately preceding the
transaction and (b) shall, at the time of such transaction and after giving pro
forma effect thereto as if such transaction had occurred at the beginning of the
applicable four-quarter period, be permitted to incur at least $1.00 of
additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test set
forth in the first paragraph of Section 4.09 hereof.

            (b) No Guarantor shall sell, assign, transfer, lease, convey or
otherwise dispose of all or substantially all of its properties or assets in
one or more related transactions, to another corporation, Person or entity
unless immediately after such transaction no Default or Event of Default
exists."

         3. EFFECTIVENESS AND EFFECT.

            (a) This Fifth Supplemental Indenture shall take effect on the date
hereof (the "Effective Date").

            (b) As of the Effective Date, the Indenture shall be modified and
amended in accordance with the provisions of this Fifth Supplemental Indenture,
and all the terms and

<PAGE>

conditions of the Indenture and this Fifth Supplemental Indenture shall
be read together as though they constitute one instrument, except that, in the
case of conflict, the provisions of this Fifth Supplemental Indenture will
control. All references to the Indenture in the Indenture or in any other
agreement, document or instrument delivered in connection therewith or pursuant
thereto shall be deemed to refer to the Indenture as amended by this Fifth
Supplemental Indenture. The Indenture, as modified and amended by this Fifth
Supplemental Indenture, is hereby ratified and confirmed in all respects and
shall be binding upon all Holders.

         4. CONFLICT WITH TRUST INDENTURE ACT. If any provision of this Fifth
Supplemental Indenture limits, qualifies or conflicts with any provision of the
TIA that is required under the TIA to be part of and govern any provision of
this Fifth Supplemental Indenture, the provisions of the TIA shall control. If
any provision of this Fifth Supplemental Indenture modifies or excludes any
provision of the TIA that may be modified or excluded, the provision of the TIA
shall be deemed to (i) be applicable to the Indenture as so modified or (ii) be
excluded by this Fifth Supplemental Indenture, as the case may be.

         5. SEVERABILITY. In the event any provision of this Fifth Supplemental
Indenture shall be held to be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

         6. SUCCESSORS. All covenants and agreements in this Fifth Supplemental
Indenture of the Company, the Guarantors and the Trustee shall bind their
successors and assigns, whether so expressed or not.

         7. NEW YORK LAW TO GOVERN. This Fifth Supplemental Indenture shall be
governed by and construed in accordance with the internal laws of the State of
New York, as applied to contracts made and performed with in the State of New
York, without regard to principles of conflicts of law.

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

         9. EFFECT OF HEADINGS. The section headings herein are for convenience
only and shall not affect the construction hereof.

         10. THE TRUSTEE. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Fifth
Supplemental Indenture or for or in respect of the recitals contained herein,
all of which recitals are made solely by the Company and the Guarantors. In
entering into this Fifth Supplemental Indenture, the Trustee shall be entitled
to the benefit of every provision of the Indenture relating to the conduct or
affecting the liability or affording protection to the Trustee, whether or not
explicitly provided herein.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

<PAGE>

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

                          COLUMBUS McKINNON CORPORATION

                          By: /s/ Robert L. Montgomery
                              -----------------------------
                          Name:  Robert L. Montgomery
                          Title: Executive Vice President

                          CRANE, ENGINEERING & SERVICE GROUP, INC.

                          By: /s/ Robert L. Montgomery
                              -----------------------------
                          Name:  Robert L. Montgomery
                          Title: Vice President

                          AUTOMATIC SYSTEMS, INC.

                          By: /s/ Robert L. Montgomery
                              -----------------------------
                          Name:  Robert L. Montgomery
                          Title: Treasurer

                          LICO STEEL, INC.

                          By: /s/ Robert L. Montgomery
                              -----------------------------
                          Name: Robert L. Montgomery
                          Title:   Treasurer

                          YALE INDUSTRIAL PRODUCTS, INC.

                          By: /s/ Robert L. Montgomery
                              -----------------------------
                          Name:  Robert L. Montgomery
                          Title: Vice President and Treasurer

                          STATE STREET BANK AND TRUST COMPANY, N.A., as Trustee

                          By: /s/ Jason G. Gregory
                              -----------------------------
                          Name:  Jason G. Gregory
                          Title: Assistant Vice President<PAGE>
                                                                   Exhibit 10.20

                       TENTH AMENDMENT TO CREDIT AGREEMENT

         THIS TENTH AMENDMENT TO CREDIT AGREEMENT (this "Amendment"), dated as
of April 16, 2002, is by and among COLUMBUS MCKINNON CORPORATION, a New York
corporation (the "Borrower"), the banks, financial institutions and other
institutional lenders which are parties to the Credit Agreement (as such term is
defined below) (the "Lenders"), FLEET NATIONAL BANK, as Initial Issuing Bank
(the "Initial Issuing Bank"), FLEET NATIONAL BANK, as the Swing Line Bank (the
"Swing Line Bank"; each of the Lenders, the Initial Issuing Bank and the Swing
Line Bank, individually, a "Lender Party" and, collectively, the "Lender
Parties"), and FLEET NATIONAL BANK, as administrative agent (together with any
successor appointed pursuant to Article VII of the Credit Agreement, the
"Administrative Agent") for the Lender Parties.

                              W I T N E S S E T H :

         WHEREAS, the Borrower, Lenders, Initial Issuing Bank, Swing Line Bank
and Administrative Agent are party to that certain Credit Agreement, dated as of
March 31, 1998, as amended by that certain First Amendment to Credit Agreement,
dated as of September 23, 1998, that certain Second Amendment to Credit
Agreement and Consent, dated as of February 12, 1999, that certain Third
Amendment to Credit Agreement and Consent, dated as of November 16, 1999, that
certain Fourth Amendment to Credit Agreement and Waiver, dated as of February
15, 2000, that certain Fifth Amendment to Credit Agreement, dated as of
September 28, 2000, that certain Sixth Amendment to Credit Agreement and
Consent, dated as of February 5, 2001, that certain Seventh Amendment to Credit
Agreement and Consent, dated as of June 26, 2001, that certain Eighth Amendment
to Credit Agreement, dated as of November 21, 2001, and the certain Ninth
Amendment to Credit Agreement (the "Ninth Amendment"), dated as of February 12,
2002 (as so amended and as it may hereafter be further amended, supplemented,
restated, extended or otherwise modified from time to time, the "Credit
Agreement");

         WHEREAS, pursuant to the Ninth Amendment, the Lenders consented to the
sale of the Borrower's subsidiary, Automatic Systems, Inc. ("ASI"), subject to
certain conditions set forth therein (such sale, as consented to in the Ninth
Amendment, the "ASI Sale");

         WHEREAS, Borrower has requested that certain of the conditions to the
ASI Sale be modified;

         WHEREAS, Defaults or Events of Default exist under the financial
covenants set forth in Section 5.04 of the Credit Agreement as at and for the
period ended March 31, 2002 (the Defaults or Events of Default described in the
preceding clauses, the "Existing Events of Default");

         WHEREAS, the Borrower has requested that, notwithstanding the Existing
Events of Default, the Lenders continue to make Revolving Credit Advances and
Alternative Currency Revolving Credit Advances, the Swing Line Bank continue to
make Swing Line Advances and the Issuing Bank continue to issue Letters of
Credit and Alternative Currency Letters of Credit in

<PAGE>

an aggregate outstanding amount not to exceed $10,000,000 between the date of
this Amendment and June 30, 2002;

         WHEREAS, the Administrative Agent and Lender Parties are agreeable to
the foregoing as and to the extent set forth in this Amendment and subject to
each of the terms and conditions stated herein.

         NOW THEREFORE, in consideration of the premises and the mutual
covenants set forth herein and of the loans or other extensions of credit
heretofore, now or hereafter made to, or for the benefit of, the Borrower and
its Subsidiaries by the Lender Parties, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereby agree as follows:

1. Definitions. Except to the extent otherwise specified herein, capitalized
terms used in this Amendment shall have the same meanings ascribed to them in
the Credit Agreement.

2. Consent to Modifications to Conditions of ASI Sale. The Administrative Agent
and Lender Parties hereby consent to the following modifications to the
conditions of the ASI Sale, as set forth in the Ninth Amendment: (a) the ASI
Sale may be structured as a sale of the assets of ASI and (b) the total amount
of cash to be paid to the Borrower at the closing of the ASI Sale shall be at
least $16,000,000. Except as so modified, all of the conditions to the ASI Sale
as set forth in the Ninth Amendment shall remain in full and force and effect,
shall not be deemed to have been waived or modified in any respect and are
hereby ratified and confirmed.

3. Consent to Additional Advances and Issuances of Letters of Credit.
Notwithstanding the Existing Events of Default, the Administrative Agent and the
Lender Parties hereby consent to the making of Revolving Credit Advances,
Alternative Currency Revolving Credit Advances and Swing Line Advances and the
issuance of Letters of Credit and Alternative Currency Letters of Credit to or
for the account of the Borrower during the period from the date hereof until
June 30, 2002; provided, that the aggregate principal amount of the Revolving
Credit Advances plus the Assigned Dollar Value of Alternative Currency Revolving
Credit Advances plus the aggregate principal amount of the Swing Line Advances
plus the aggregate Available Amount of all Letters of Credit and Alternative
Currency Letters of Credit made or issued during such period shall not exceed
$10,000,000. The consent set forth in the immediately preceding sentence is a
limited consent, limited to its express terms, and is not a consent with respect
to any other provision or matter relating to the Credit Agreement or any other
Loan Document. Such consent is not a waiver of any of the Existing Events of
Default or an agreement or understanding to waive at any future time any of the
Existing Events of Default.

4. Amendments.

    4.1. Section 1.01 of the Credit Agreement is amended by deleting from the
definition of "Applicable Margin" the entire pricing chart contained therein and
replacing it with the following chart:

                                      -2-

<PAGE>

<TABLE>
<CAPTION>
                                        Applicable Margin for      Applicable Margin for      Applicable Margin for
Ratio of Funded Debt to EBITDA            Prime Rate Advances     Eurodollar Rate Advances        Commitment Fee
------------------------------          ---------------------     ------------------------    ---------------------

<S>                                       <C>                     <C>                           <C>
Equal to or greater than 5.50                   2.500%                     3.750%                     0.500%
Equal to or greater than 5.00 less              2.250%                     3.500%                     0.500%
    than 5.50
Equal to or greater than 4.50 less              2.000%                     3.250%                     0.500%
    than 5.00
Equal to or greater than 4.00 less
    than 4.50                                   1.750%                     3.000%                     0.500%
Equal to or greater than 3.50 less
    than 4.00                                   1.500%                     2.750%                     0.500%
Equal to or greater than 3.00 less
    than 3.50                                   1.250%                     2.500%                     0.500%
Less than 3.00                                  1.000%                     2.250%                     0.400%
</TABLE>

    4.2. As of the effective date of this Amendment, the Applicable Margins
shall automatically be set at the levels set forth above for a Ratio of Funded
Debt to EBITDA equal to or greater than 5.00 and less than 5.50. Thereafter, the
Applicable Margins shall be subject to future adjustment as and at the times set
forth in the last paragraph of the definition of "Applicable Margin".

5. Conditions Precedent to this Amendment. The effectiveness of this Amendment
is subject to the satisfaction, in form and substance satisfactory to the
Administrative Agent, of each of the following conditions precedent:

    5.1. The Borrower and Required Lenders shall have duly executed and
delivered this Amendment and each other Loan Party shall have duly executed the
attached Acknowledgment and Ratification in connection with this Amendment

    5.2. After giving effect to this Amendment, no Default or Event of Default
shall have occurred and be continuing.

    5.3. The Borrower shall have paid an amendment fee to the Administrative
Agent, for the account of each Lender which has approved this Amendment, as
evidenced by such Lender's timely execution and delivery of a counterpart
signature page to this Amendment (each such Lender being an "Approving Lender"),
in an amount equal to 0.05% (i.e. 5 basis points) of such Approving Lender's
Revolving Credit Commitment.

6. Reference to and Effect Upon the Credit Agreement and other Loan Documents.

    6.1. Except for the specific consents set forth in Sections 2 and 3 above,
the Credit Agreement and each of the other Loan Documents shall remain in full
force and effect and each is hereby ratified and confirmed.

                                      -3-

<PAGE>

    6.2. Upon the effectiveness of this Amendment, each reference in the Credit
Agreement to "this Agreement", "hereunder", "hereof", "herein" or any other word
or words of similar import shall mean and be a reference to the Credit Agreement
as amended hereby, and each reference in any other Loan Document to the Credit
Agreement or any word or words of similar import shall mean and be a reference
to the Credit Agreement as amended hereby.

7. Counterparts. This Amendment may be executed in any number of counterparts,
each of which when so executed shall be deemed an original, but all such
counterparts shall constitute one and the same instrument. Delivery of an
executed counterpart to this Amendment by telecopier shall be as effective as
delivery of a manually executed counterpart of this Amendment.

8. Costs and Expenses. The Borrower shall pay on demand all reasonable fees,
costs and expenses incurred by Administrative Agent (including, without
limitation, all reasonable attorneys' fees) in connection with the preparation,
execution and delivery of this Amendment and the taking of any actions by any
Person in connection herewith.

9. GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE INTERNAL LAWS (AS OPPOSED TO CONFLICTS OF LAW PROVISIONS) OF
THE STATE OF NEW YORK.

10. Headings. Section headings in this Amendment are included herein for
convenience of reference only and shall not constitute a part of this Amendment
for any other purpose.

                            [signature pages follow]

                                      -4-

<PAGE>

                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be executed by their respective officers thereunto duly authorized
on the date first above written.

                                              COLUMBUS MCKINNON CORPORATION

                                              By:    /s/ Robert L. Montgomery
                                                  ------------------------------
                                                     Robert L. Montgomery
                                              Title: Executive Vice President

<PAGE>

                         ACKNOWLEDGMENT AND RATIFICATION

         The undersigned hereby acknowledge and agree to this Amendment, and
agree that the Guaranty, the Security Agreement and the Intellectual Property
Security Agreement, and each other Loan Document executed by the undersigned
shall remain in full force and effect and each is hereby ratified and confirmed
by and on behalf of the undersigned, this 12th day of February, 2002.

                                              AUTOMATIC SYSTEMS, INC.

                                              By:    /s/ Robert L. Montgomery
                                                  ------------------------------
                                                     Robert L. Montgomery
                                              Title: Treasurer

                                              LICO STEEL, INC.

                                              By:    /s/ Robert L. Montgomery
                                                  ------------------------------
                                                     Robert L. Montgomery
                                              Title: Treasurer

                                              CRANE EQUIPMENT & SERVICE, INC.

                                              By:    /s/ Robert L. Montgomery
                                                  ------------------------------
                                                     Robert L. Montgomery
                                              Title: Treasurer

                                              YALE INDUSTRIAL PRODUCTS, INC.

                                              By:    /s/ Robert L. Montgomery
                                                  ------------------------------
                                                     Robert L. Montgomery
                                              Title: Treasurer

<PAGE>

                                          Lenders

                                          FLEET NATIONAL BANK, as Administrative
                                          Agent, Initial Issuing Bank, Swing
                                          Line Bank and Lender

                                          By: /s/ John C. Wright
                                              ----------------------------------
                                          Name:  John C. Wright
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          ABN-AMRO BANK N.V. NEW YORK
                                          BRANCH, as a Co-Agent and Lender

                                          By: /s/ Sean P. Giglio
                                              ----------------------------------
                                          Name:  Sean P. Giglio
                                          Title: Vice President

                                          By: /s/ Craig W. Trantwein
                                              ----------------------------------
                                          Name:  Craig W. Trantwein
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          THE BANK OF NOVA SCOTIA, as a Co-Agent
                                          and Lender

                                          By: /s/ Todd S. Meller
                                              ----------------------------------
                                          Name:  Todd S. Meller
                                          Title: Managing Director

<PAGE>

                                          Lenders

                                          MANUFACTURERS AND TRADERS TRUST
                                          COMPANY, as a Co-Agent and Lender

                                          By: /s/ Jeffrey P. Kapefick
                                              ----------------------------------
                                          Name:  Jeffrey P. Kapefick
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          HSBC BANK USA (formerly known as
                                          Marine Midland Bank), as a Co-Agent
                                          and Lender

                                          By: /s/ John G. Tiarney
                                              ----------------------------------
                                          Name:  John G. Tiarney
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          COMERICA BANK

                                          By: /s/ Joel S. Gordon
                                              ----------------------------------
                                          Name:  Joel s. Gordon
                                          Title: Account Officer

<PAGE>

                                          Lenders

                                          FIRST UNION NATIONAL BANK

                                          By:______________________________

                                          Name: ___________________________

                                          Title: ____________________________

<PAGE>

                                          Lenders

                                          KEYBANK NATIONAL ASSOCIATION

                                          By: /s/ Mary K. Young
                                              ----------------------------------
                                          Name:  Mary K. Young
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          CITIZENS BANK OF PENNSYLVANIA

                                          By: /s/ Brian V. Ciaverella
                                              ----------------------------------
                                          Name:  Brian V. Ciaverella
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          BANKERS TRUST COMPANY

                                          By:______________________________

                                          Name: ___________________________

                                          Title: ____________________________

<PAGE>

                                          Lenders

                                          THE BANK OF NEW YORK

                                          By: /s/ Christine T. Rio
                                              ----------------------------------
                                          Name:  Christine T. Rio
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          PNC BANK, NATIONAL ASSOCIATION

                                          By: /s/ Stephen W. Boyd
                                              ----------------------------------
                                          Name:  Stephen W. Boyd
                                          Title: Vice President

<PAGE>

                                          Lenders

                                          NATIONAL CITY BANK OF PENNSYLVANIA

                                          By:______________________________

                                          Name: ___________________________

                                          Title: ____________________________

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00040-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00040-of-00352.parquet"}]]