The Lassco Wizer W166 MasterPunch Plate Punch is compatible with paper, polyester, or metal plates. The W166 Master Punch is 12" wide and is open ended with an adjustable plate guide, accommodating any width plate. This offset plate punch will produce 25 round holes at a time and is heavy duty with pins are made from hi-strength alloy, heat treated to tool steel hardness for exceptional resistance to wear and abrasion. It works great with AB Dick, Multi, Chief, Itek, Ryobi, Hamada and more plates. The pins are spaced 1/2" apart, center to center, and are 11/64" in diameter. This lassco Wizer W-166 plate punch comes with a standard one year manufacturer's warranty against defects.