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

In connection with the Quarterly Report on Form 10-Q of Lincoln Electric Holdings, Inc. (the "Company") for the three months ended June 30, 2019, as filed with the Securities and Exchange Commission (the "Report"), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to such officer's knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

Date: July 26, 2019

/s/ Christopher L. Mapes

Christopher L. Mapes

Chairman, President and Chief Executive Officer

/s/ Vincent K. Petrella

Vincent K. Petrella

Executive Vice President, Chief Financial

Officer and Treasurer