Mark Keymer develops unique
compound leverage hand tools
for job-site metal fabrication.
Zip-In screws are an industry
Operations move from
Minneapolis, MN to
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.