The Makita® Oval Punch, 7/16” x 21/32” (11 x 16.5 mm) is ideal for punching holes in general steel and stainless steel. The oval punch is for use with the Makita® Oval Die, 7/16” x 21/32” (11 x 16.5 mm), model SC00000260 (sold separately). The oval 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.