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Mark Keymer develops unique

compound leverage hand tools

for job-site metal fabrication.




Zip-In screws are an industry

changing success.

Operations move from

Minneapolis, MN to

Annandale, MN.

Early Malco Tool Schools

are conducted by Malco

Founder, Mark Keymer.

Mark Keymer founded Malco in 1950 and

established a legacy of innovation, efficiency

and quality. He retired in 1978. His family

and Malco employee owners carry on his

proven business approach today.