The Makita® Round Die, 1/2” (13 mm) is ideal for punching holes in general steel and stainless steel. The round die is for use with the Makita® 18V LXT® Cordless Metal Hole Punch (XPP01, sold separately). The round die 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.