Jack's Sand Blue legs are printed to resemble jeans with knee-pads, pockets, and belt printing on the hip. He has a printed plaid green shirt and a leather jacket. He has one green arm with a yellow hand, and one mechanical arm, similar to the one used by Dr. Inferno and the Alien Cyborg. His yellow face is printed with dark orange eyebrows, mustache and beard, and has a growling expression. He wears a flat hat, and carries a large hammer.
Jack McHammer is one of the Monster Fighters. The Crazy Scientist was the one who removed Jack's arm, which was then replaced with a mechanical one. Ever since, the Scientist and his Monster have become Jack's formidable opponents.
Jack McHammer is a burly lumberjack, built like the trunk of an oak. Jack never leaves home without his hammer and manly red beard. When I came upon this plastic giant, I knew I had just the match for the Crazy Professor’s Monster.
Name: Jack McHammer
Hometown:The backwoods of Scotland… or possibly Canada
Strengths: Brute Strength, hammer smashing
Hobbies: Lifting things up and putting them down
Battle Scar: Steam-powered artificial arm
Monster Arch Enemy: Crazy Scientist’s Monster