Dagger Tools Rawhide metal shaping mallet, 2" diameter X 3 1/2" head length, are excellent for shrinking metal. The treated rawhide is non-marring and can be re-shaped by sanding. When paired with a hard opposite side, effective cold shrinking via tuck forming can be accomplished. For metalworking, metal shaping, sheet metal work, and auto body repair and restoration. 11" handle length, weight 1lbs.