Double Hammer Lever DeviceThe Legendary Slim The Hammerman Farman in 1975 at Madison Square Garden levered 56 lbs on his double hammer setup. Putting 1,736 lbs of pressure on his wrists. Slim was one of my inspirations for pursuing feats of strength and for the Double hammer lever Device I came up with to train for this feat. The latest DHLD(Double Hammer Lever Device) is a solid unit, 1. 5" handle (oval shaped at ends) like a true sledge handle. 31" from handle end to center