Square head 70mm diameter hardened steel screw hole cutter and brass corrosion washer Perfectly smooth edges for a perfect finish Cutting capacity: 2mm for metal sheet and 1.2mm for stainless steel A: 87mm Thread: M20 x 1.50mm Part Number: PI-71070 Cutter: Piher 71070 Square Head Screw Hole Punch Diameter 70 mm Type: