90mm square head hardened steel screw hole punch and brass corrosion washer Perfectly smooth edges for a perfect finish Cutting capacity: 2mm for metal sheet and 1.2mm for stainless steel A: 112mm Thread: M20 x 1.50mm Part Number: PI-71090 Cutter: Piher 71090 Square Head Screw Hole Punch Diameter 90 mm Type: