Exhibit 32.1


                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


The undersigned officer of Acme United Corporation (the "Company") hereby
certifies to my knowledge that the Company's quarterly report on Form 10-Q for
the quarterly period ended June 30, 2007 (the "Report"), as filed with the
Securities and Exchange Commission on the date hereof, fully complies with the
requirements of section 13(a) or 15(d), as applicable, of the Securities
Exchange Act of 1934, as amended, and that the information contained in the
Report fairly presents, in all material respects, the financial condition and
results of operations of the Company. This certification is provided solely
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, and shall not be deemed to be a part of the Report
or "filed" for any purpose whatsoever.


By          /s/ WALTER C. JOHNSEN
         ------------------------------
                Walter C. Johnsen
           Chairman of the Board and
             Chief Executive Officer

Dated:  August 7, 2007




A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to Acme United Corporation and will
be retained by Acme United Corporation and furnished to the Securities and
Exchange Commission or its staff upon request.