The Makita® Round Punch, 11/32” (8.5 mm) is ideal for punching holes in general steel and stainless steel. The round punch is for use with the Makita® Round Die, 11/32” (8.5 mm), model SC00000209 (sold separately). The round punch has a metal plate thickness capacity range of 5/64” (2 mm) to 5/32” (4 mm) in general steel and 1/8” (3 mm) to 5/32” (4 mm) in stainless steel. It installs quickly and easily for user convenience.