45mm Square Punch Die is designed to be installed on hydraulic punch to drill 1 3/4' x 1 3/4' holes on up to 16-gauge stainless steel, 11-gauge iron, steel, aluminum Compatible with our 8/10/15 Ton Hydraulic Knockout Punch Kit Made of heat treated 40Cr Steel for enhanced hardness, tensile strength, and rust resistance, suitable for long-time punching and cutting Ideal for sheet metal fabrication, electric service box Overall Dimension(LxWxH) 3 7/16' x 3 7/16' x 4 5/16' (8.8 x 8.8 x 11 cm)