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