**Exhibit
      10.186**




April
      6,
      2007





Jack
      Pleiter, Manager


Twisted
      Cactus Enterprises


7000
      E.
      Shea Blvd, Suite 251


Scottsdale,
      AZ 85282





Dear
      Jack:





Re:
            Asset
                Purchase Agreement (“Agreement”) dated December 7, 2006 executed by and
                between Mace Security International, Inc., Mace Car Wash, Inc., and
                Mace
                Car Wash-Arizona, Inc., collectively (“Sellers”), and Twisted Cactus
                Enterprises, LLC (“Purchaser”).





The
      Agreement was also executed by First American Title Insurance Company (“Escrow
      Agent”) with respect to the provisions pertaining to the Escrow Agent. Sellers
      and Purchaser have entered into this Letter Agreement (“First Amendment”) to
      amend and supplement the terms and provisions of the Agreement. Terms in this
      First Amendment which are capitalized shall have the meanings given the terms
      in
      the Agreement, unless the capitalized term is specifically defined in this
      First
      Amendment. The Escrow Agent has entered into this First Amendment with respect
      to the provisions relating to Escrow Agent. Purchaser, Sellers and Escrow Agent
      hereby agree as follows:





1.
      Section 1.2 of the Agreement provides that the date the Closing occurs shall
      be
      on April 6, 2007, or such other date that the parties to the Agreement agree
      to
      in writing. The Purchaser being unable to tender the Purchase Price by April
      6,
      2007 has requested Sellers to extend the Closing Date to May 16, 2007.
      Conditioned on the Purchaser and Escrow Agent performing and complying with
      the
      provisions of Paragraph 2 below, the parties agree that the Closing Date shall
      be on May 16, 2007, or such other date that the Sellers and Purchaser agree
      to
      in writing.





2.
      In
      exchange for Sellers’ entry into this First Amendment and in lieu of terminating
      the Agreement, Purchaser shall direct the Escrow Agent to and the Escrow Agent
      shall immediately deliver the Deposit to MSI via federal wire pursuant to the
      wiring instructions attached hereto as Exhibit A. In addition, Purchaser hereby
      agrees to deposit with Escrow Agent an additional sum of Two Hundred Fifty
      Thousand ($250,000) Dollars (“Extension Deposit”) by good funds on or before
      April 6, 2007, which additional sum shall be added to and considered to be
      part
      of the Deposit, increasing the total Deposit to Seven Hundred and Fifty Thousand
      Dollars ($750,000), of which Five Hundred Thousand Dollars ($500,000) shall
      be
      held by MSI and Two Hundred Fifty Thousand ($250,000) shall be held by the
      Escrow Agent. The entire Deposit including, without limitation, the portion
      of
      the Deposit held by MSI shall be applied to the Purchase Price and paid out
      by
      MSI, as set forth in the Agreement, except MSI shall not be required to hold
      the
      Deposit in a separate, federally-insured, interest-bearing account with a
      national banking association, but may hold its portion of the Deposit as MSI
      solely determines. The entire Deposit, including that portion released to MSI,
      shall be fully refunded to Purchaser or belong to MSI as liquidated damages
      as
      set forth in Sections 1.3(c) and 1.8 of the Agreement or as otherwise provided
      for in the Agreement.





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3.  Sellers
      hereby acknowledge that Purchaser is obtaining financing in connection with
      its
      purchase of the Leased Property and Owned Property. Accordingly, Sellers shall
      request the landlords’ of the Leased Properties to execute any and all documents
      reasonably requested or required by Purchaser’s lender including, but not
      limited to, landlord estoppel certificates, and memorandum of leases, as
      applicable.





4.  Sellers
      and Purchaser hereby agree that Section 10.3 of the Agreement is modified to
      provide that Purchaser may assign its interests in the Agreement with Sellers’
prior written consent and such consent shall not be unreasonably withheld.





5.
      Purchaser and Sellers further agree that all other provisions of the Agreement
      are in full force and effect and not modified.





6.
      This
      First Amendment may be executed simultaneously in two or more counterparts,
      each
      of which shall be deemed an original and all of which together shall constitute
      but one and the same instrument. This First Amendment may be executed by
      facsimile transmission and a signature transmitted by facsimile transmission
      shall be binding on the party so executing this Letter Agreement.





This
      First Amendment dated April 6, 2007 has been agreed to by the undersigned
      parties.




**SELLERS:**
              
              Mace
                Security International, Inc.By:  /s/
              Robert M. KramerName:
                Robert M. Kramer
              Title:
                Executive Vice President  Mace
                  Car Wash, Inc and Mace Car Wash - Arizona, Inc.By:  /s/
                Robert M. KramerName:
                    Robert Kramer
                  Title:
                    Vice President
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**SIGNATURES
      OF PURCHASER AND ESCROW AGENT CONTINUED ON PAGE 3 FOLLOWING**


**PURCHASER:**
                  
                  Twisted
                    Cactus Enterprises, LLC.By:  /s/
                Jack PleiterName:
                    Jack Pleiter
                  Title:
                    Manager  **ESCROW
                      AGENT:**
                    
                    First
                      American Title Insurance Company
                    
                    Executed
                      only for purposes of agreeing to the Provisions pertaining
                      to the Escrow
                      Agent.By:
                   /s/ Sheila HunterName:
                        Sheila Hunter
                      Title:
                        Senior Commercial Escrow
                        Officer
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