The oval punch die is ideal for punching holes in steel and stainless steel. The oval punch is designed for use with the Makita® oval die, 23/64" x 17/32" (9 x 13.5 mm), model SC00000252 (sold separately). The oval punch can punch through sheet thicknesses of 2 to 4 mm in steel and 3 to 4 mm in stainless steel. It can be installed quickly and easily for convenience of use.