Document:

<PAGE>
                                                                     Exhibit 4.6

                           Fourth AMENDMENT AGREEMENT

         This Fourth Amendment Agreement (this "Amendment") is made as of the
31st day of December, 2001, by and among PARK-OHIO INDUSTRIES, INC., an Ohio
corporation ("Borrower"), the banking institutions listed on SCHEDULE 1 to the
Credit Agreement, as hereinafter defined ("Banks"), KEYBANK NATIONAL
ASSOCIATION, as administrative agent for the Banks ("Agent"), and THE HUNTINGTON
NATIONAL BANK, as co-agent for the Banks ("Co-Agent").

         WHEREAS, Borrower, Agent and the Banks are parties to a certain Credit
and Security Agreement, dated as of December 21, 2000, as amended and as the
same may from time to time be further amended, restated or otherwise modified,
which provides, among other things, for loans and letters of credit aggregating
One Hundred Eighty Million Dollars ($180,000,000), all upon certain terms and
conditions stated therein (the "Credit Agreement");

         WHEREAS, Borrower, Agent and the Banks desire to amend the Credit
Agreement to modify certain provisions thereof; and

         WHEREAS, unless otherwise defined herein, each capitalized term used
herein shall be defined in accordance with the Credit Agreement;

         NOW, THEREFORE, in consideration of the premises and of the mutual
covenants herein contained and for other valuable considerations, Borrower,
Agent and the Banks hereby agree as follows:

         1. AMENDMENT TO FINANCIAL COVENANTS SECTION. Section 5.7 of the Credit
Agreement is hereby amended to delete subsection (e) therefrom and to insert in
place thereof the following:

                  (e) NET WORTH. Borrower shall not suffer or permit
         Consolidated Net Worth, at any time, based upon the financial
         statements of Borrower for the most recently completed fiscal quarter,
         to be less than the current minimum amount required, which current
         minimum amount required shall be One Hundred Ten Million Dollars
         ($110,000,000) on December 31, 2001 through March 30, 2002, with such
         current minimum amount required to be positively increased by the
         Increase Amount on March 31, 2002, and by an additional Increase Amount
         on the last day of each fiscal quarter thereafter. As used herein, the
         term "Increase Amount" shall mean an amount equal to (i) sixty-five
         percent (65%) of the positive Consolidated Net Earnings of Borrower for
         the fiscal quarter then ended, plus (ii) one hundred percent (100%) of
         the proceeds of any equity offering by Borrower or any of its
         Subsidiaries or any debt offering by Borrower or any of its
         Subsidiaries to the extent converted to equity.

         2. CLOSING DELIVERIES. Concurrently with the execution of this
Amendment, Borrower shall:

<PAGE>

                  (a) cause each Guarantor of Payment to consent and agree to
         and acknowledge the terms of this Amendment; and

                  (b) pay all legal fees and expenses of Agent in connection
         with this Amendment and the Loan Documents.

         3. REPRESENTATIONS AND WARRANTIES. Borrower hereby represents and
warrants to Agent and the Banks that (a) Borrower has the legal power and
authority to execute and deliver this Amendment, (b) the officers executing this
Amendment have been duly authorized to execute and deliver the same and bind
Borrower with respect to the provisions hereof, (c) the execution and delivery
hereof by Borrower and the performance and observance by Borrower of the
provisions hereof do not violate or conflict with the organizational agreements
of Borrower or any law applicable to Borrower or result in a breach of any
provision of or constitute a default under any other agreement, instrument or
document binding upon or enforceable against Borrower, (d) no Default or Event
of Default exists under the Credit Agreement, nor will any occur immediately
after the execution and delivery of this Amendment or by the performance or
observance of any provision hereof, (e) Borrower is not aware of any claim or
offset against, or defense or counterclaim to, any of Borrower's obligations or
liabilities under the Credit Agreement or any Related Writing and (f) this
Amendment constitutes a valid and binding obligation of Borrower in every
respect, enforceable in accordance with its terms.

         4. WAIVER. Borrower, by signing below, hereby waives and releases Agent
and each of the Banks and their respective directors, officers, employees,
attorneys, affiliates and subsidiaries from any and all claims, offsets,
defenses and counterclaims of which Borrower is aware, such waiver and release
being with full knowledge and understanding of the circumstances and effect
thereof and after having consulted legal counsel with respect thereto.

         5. REFERENCES TO CREDIT AGREEMENT. Each reference that is made in the
Credit Agreement or any Related Writing to the Credit Agreement shall hereafter
be construed as a reference to the Credit Agreement as amended hereby. Except as
herein otherwise specifically provided, all provisions of the Credit Agreement
shall remain in full force and effect and be unaffected hereby. This Amendment
is a Related Writing as defined in the Credit Agreement.

         6. COUNTERPARTS. This Amendment may be executed in any number of
counterparts, by different parties hereto in separate counterparts and by
facsimile signature, each of which when so executed and delivered shall be
deemed to be an original and all of which taken together shall constitute but
one and the same agreement.

         7. GOVERNING LAW. The rights and obligations of all parties hereto
shall be governed by the laws of the State of Ohio, without regard to principles
of conflicts of laws.

                  [Remainder of page intentionally left blank.]

                                       2
<PAGE>

         8. JURY TRIAL WAIVER. BORROWER, AGENT AND EACH OF THE BANKS HEREBY
WAIVE ANY RIGHT TO HAVE A JURY PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER
SOUNDING IN CONTRACT, TORT OR OTHERWISE, AMONG BORROWER, AGENT AND THE BANKS, OR
ANY THEREOF, ARISING OUT OF, IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO
THE RELATIONSHIP ESTABLISHED AMONG THEM IN CONNECTION WITH THIS AGREEMENT OR ANY
NOTE OR OTHER INSTRUMENT, DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN
CONNECTION HEREWITH OR THE TRANSACTIONS RELATED THERETO. THIS WAIVER SHALL NOT
IN ANY WAY AFFECT, WAIVE, LIMIT, AMEND OR MODIFY AGENT'S OR ANY BANK'S ABILITY
TO PURSUE REMEDIES PURSUANT TO ANY CONFESSION OF JUDGMENT OR COGNOVIT PROVISION
CONTAINED IN ANY NOTE OR OTHER INSTRUMENT, DOCUMENT OR AGREEMENT AMONG BORROWER,
AGENT AND THE BANKS, OR ANY THEREOF.

                                         PARK-OHIO INDUSTRIES, INC.

                                         By:     /s/ Ronald J. Cozean
                                                 --------------------
                                               Ronald J. Cozean, Secretary

                                         KEYBANK NATIONAL ASSOCIATION
                                           as Agent and as a Bank

                                         By: /s/ Babette C. Schubert
                                             -----------------------
                                             Babette C. Schubert, Vice President
                                             and Senior Banker

                                         THE HUNTINGTON NATIONAL BANK,
                                           as Co-Agent and as a Bank

                                         By:/s/ John R. Macks
                                            ------------------------------------
                                         Name: John R. Macks
                                               ---------------------------------
                                         Title: Vice President
                                                --------------------------------

                                         THE NORTHERN TRUST COMPANY

                                         By: /s/ David J. Sullivan
                                             -----------------------------------
                                         Name: David J. Sullivan
                                               ---------------------------------
                                         Title: Vice President
                                                --------------------------------

                                       3
<PAGE>

                                         FIFTH THIRD BANK, NORTHEASTERN
                                           OHIO

                                         By: /s/ Roy C. Lanctot
                                             -----------------------------------
                                         Name: Roy C. Lanctot
                                               ---------------------------------
                                         Title: Vice President
                                                --------------------------------

                                       4
<PAGE>

                            GUARANTOR ACKNOWLEDGMENT
                            ------------------------

         The undersigned consents and agrees to and acknowledges the terms of
the foregoing Fourth Amendment Agreement. Each of the undersigned further agrees
that the obligations of the undersigned pursuant to the Guaranty of Payment
executed by the undersigned shall remain in full force and effect and be
unaffected hereby.

         The undersigned hereby waives and releases Agent and the Banks and
their respective directors, officers, employees, attorneys, affiliates and
subsidiaries from any and all claims, offsets, defenses and counterclaims of
which the undersigned is aware, such waiver and release being with full
knowledge and understanding of the circumstances and effect thereof and after
having consulted legal counsel with respect thereto.

         JURY TRIAL WAIVER. BORROWER, AGENT, EACH BANK AND EACH GUARANTOR HEREBY
WAIVES ANY RIGHT TO HAVE A JURY PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER
SOUNDING IN CONTRACT, TORT OR OTHERWISE, AMONG BORROWER, AGENT, THE BANKS OR THE
GUARANTORS, OR ANY THEREOF, ARISING OUT OF, IN CONNECTION WITH, RELATED TO, OR
INCIDENTAL TO THE RELATIONSHIP ESTABLISHED AMONG THEM IN CONNECTION WITH THIS
AGREEMENT OR ANY NOTE OR OTHER INSTRUMENT, DOCUMENT OR AGREEMENT EXECUTED OR
DELIVERED IN CONNECTION HEREWITH OR THE TRANSACTIONS RELATED THERETO. THIS
WAIVER SHALL NOT IN ANY WAY AFFECT, WAIVE, LIMIT, AMEND OR MODIFY AGENT'S OR ANY
BANK'S ABILITY TO PURSUE REMEDIES PURSUANT TO ANY CONFESSION OF JUDGMENT OR
COGNOVIT PROVISION CONTAINED IN ANY NOTE OR OTHER INSTRUMENT, DOCUMENT OR
AGREEMENT AMONG BORROWER, AGENT, THE BANKS AND THE GUARANTORS, OR ANY THEREOF.

<TABLE>
<S>                                                               <C>
ATBD, INC.                                                        PARK AVENUE TRAVEL LTD.
CASTLE RUBBER COMPANY                                             PARK-OHIO STRUCTURAL HARDWARE LLC
CICERO FLEXIBLE PRODUCTS, INC.                                    PHARMACEUTICAL LOGISTICS, INC.
DONEGAL BAY LTD.                                                  PHARMACY WHOLESALE LOGISTICS, INC.
GENERAL ALUMINUM MFG. COMPANY                                     PMC-COLINET, INC.PMC INDUSTRIES CORP.
ILS TECHNOLOGY, INC.                                              PRECISION MACHINING CONNECTION LLC
INTEGRATED HOLDING COMPANY                                        RB&W MANUFACTURING LLC
INTEGRATED LOGISTICS SOLUTIONS, INC.                              THE AJAX MANUFACTURING COMPANY
INTEGRATED LOGISTICS SOLUTIONS LLC (for itself and as successor   THE METALLOY CORPORATION
   by merger to Columbia Nut & Bolt LLC, GIS Industries, Inc.     TOCCO, INC.
   and Industrial Fasteners LLC)                                  TRICKERATION, INC.
INTEGRATED LOGISTICS HOLDING COMPANY

By: /s/ Ronald J. Cozean                                          By: /s/ Ronald J. Cozean
   -------------------------------------------                       --------------------------------------------
Ronald J. Cozean, Secretary of each of the                           Ronald J. Cozean, Secretary of each of the
foregoing companies                                                  foregoing companies
</TABLE>

                                       5<PAGE>
                                                                   EXHIBIT 10.35

                 THIRD AMENDMENT TO LOAN AND SECURITY AGREEMENT
                 ----------------------------------------------

         This Third Amendment to Loan and Security Agreement (the "AMENDMENT")
is made on July 9, 2001 by GMAC Business Credit, LLC ("LENDER") and ROCKY SHOES
& BOOTS, INC. and LIFESTYLE FOOTWARE, INC. ("BORROWERS").

                                    RECITALS

         A. Borrowers and Lender entered into a Loan and Security Agreement
dated September 18, 2000 (as amended from time to time, including by this
Amendment, the "LOAN AGREEMENT"). Capitalized terms used in this Amendment shall
have the meanings set forth in the Loan Agreement unless otherwise defined in
this Amendment.

         B. Borrowers and Lender wish to amend the Loan Agreement as set forth
below.

         THEREFORE, in consideration of the mutual promises and agreements of
the parties hereinafter set forth and for other good and valuable consideration,
the receipt and sufficiency of which is acknowledged, the parties agree as
follows:

                              TERMS AND CONDITIONS

         1.   Section 1(a) of the Loan Agreement is amended in its entirety to
              read as follows:

         (a)  A revolving line of credit (the "REVOLVING LOANS") up to the
              lesser of the "Borrowing Base" (defined below) or $56,000,000.00
              minus the from time-to-time principal balance of the Term Loan
              (the "REVOLVING ADVANCE LIMIT"). The Borrowing Base is initially
              (i) 80% of the aggregate outstanding amount of Eligible Accounts
              PLUS (ii) 41% of the aggregate value of raw materials that are
              Eligible Inventory PLUS (iii) from May 1 through October 31 of
              each year, 82% of the aggregate value of Retail Inventory which is
              Eligible Inventory and 76% of the aggregate value of finished
              goods that are Eligible Inventory; PLUS (iv) from November 1 of
              each year through April 30 of the succeeding year, 75% of the
              aggregate value of Retail Inventory which is Eligible Inventory
              and 72% of the aggregate value of finished goods that are Eligible
              Inventory, PLUS (v) 18% of the aggregate value of work in process
              which is Eligible Inventory, MINUS (vi) the Dilution Reserve MINUS
              (vii) the Availability Reserve. Notwithstanding the

<PAGE>

              foregoing, (A) aggregate advances against Eligible Inventory shall
              not exceed $27,500,000 during the period of May through October of
              each year and $23,000,000 during other periods, (B) aggregate
              advances against Eligible Inventory in Puerto- Rico shall not
              exceed $2,000,000 at any time, (C) aggregate advances against raw
              materials that are Eligible Inventory shall not exceed $10,000,000
              at any time, (D) aggregate advances against Proprietary Boxes
              (which are part of raw materials) which are Eligible Inventory
              shall not exceed the lesser of 5% of the aggregate value of raw
              material Inventory or $350,000, (E) aggregate advances against
              work in process that is Eligible Inventory shall not exceed
              $1,000,000, (F) during the period June I through September 30 of
              each year, In-transit Inventory that otherwise qualifies as
              Eligible Inventory will be treated for Borrowing base purposes as
              if the same were finished goods in a Borrower's possession;
              provided that advances against In-transit Inventory shall not
              exceed $4 million, and (G) advance rates against Eligible
              Inventory will be adjusted semi-annually in September and March of
              each year upon Lender's receipt of updated appraisals such that
              the applicable advance rate is equal to 90% of the appraised net
              orderly liquidation value of the applicable type or category of
              Inventory, based on appraisals reasonably acceptable to Lender.

         2.   The definition of Availability Reserve in Section 2 of the Loan
              Agreement is amended in its entirety to read as follows:

              "Availability Reserve" means $1,5 million through October 31, 2001
              and $3 million thereafter; PROVIDED, HOWEVER, if after receipt of
              Borrower's fiscal 2001 audited financial statement, no Event of
              Default has occurred and is continuing, the Availability Reserve
              will be reduced to zero.

         3.   The following definition is added to Section 2 of the Loan
              Agreement:

              "In-transit Inventory" means finished goods Inventory for which a
              Borrower has paid the full purchase price (or issued a letter of
              credit for the full purchase price), which is in the possession of
              a common carrier or other shipper acceptable to Lender and which
              is evidenced by documentation acceptable to Lender.

         4.   Subsection 5 of the definition of Eligible Inventory in Section
              2 of the Loan Agreement is amended in its entirety to read as
              follows:

              (5) Except for In-transit Inventory, the Inventory is in a
              Borrower's possession, and if the Inventory is located on promises
              not owned by a Borrower, the landlord or owner of such premises
              must have waived its distraint, lien, and similar rights with
              respect to such Inventory and must have agreed in a written
              agreement in form reasonably satisfactory to Lender.

                                       2

<PAGE>

         5.   The following is added as subpart 14 of the definition of Eligible
              Inventory:

              (14) If the Inventory is In-transit Inventory, the Inventory is
              insured on terms acceptable to Lender and all such insurance
              policies and proceeds. are assigned to Lender.

         6.   Upon execution of this Amendment, Borrowers shall pay Lender an
              amendment fee of $25,000.00 which will be fully earned on the date
              of this Amendment and may be charged to Borrowers' Revolving
              Loans.

         7.   Except as amended by this Amendment, all the terms and conditions
              in the Loan Agreement remain in full force and effect.

         8.   This Amendment constitutes the entire agreement of the parties in
              connection with the subject matter of this Amendment and cannot be
              changed or terminated orally. All prior agreements,
              understandings, representations, warranties and negotiations
              regarding the subject matter hereof, if any, are merged into this
              Amendment.

         9.   Borrowers and the signatory noted below represent that all
              necessary corporate action to authorize Borrowers to enter into
              this Amendment has been taken, including, without limitation,
              board of directors approval and resolutions necessary to authorize
              Borrowers' execution of this Amendment.

         10.  This Amendment may be executed in counterparts, each of which when
              so executed and delivered shall be deemed an original, and all of
              such counterparts together shall constitute but one and the same
              agreement.

                                       3

<PAGE>

         11.  This Amendment shall be governed by, and construed and enforced in
              accordance with, the laws of the State of Michigan.

GMAC BUSINESS CREDIT, LLC           ROCKY SHOES & BOOTS, INC.

By: /S/ Kathryn Williams                  By:      /s/ David Fraedrich
    --------------------------------         -----------------------------------
Print Name: Kathryn Williams                    David Fraedrich
            ------------------------            Executive Vice President
Title:   Vice President
       -----------------------------

LIFESTYLE FOOTWEAR, INC.

By:      /s/ David Fraedrich
   ---------------------------------
      David Fraedrich
      Executive Vice President

                                       4

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