Screw hole punch, square head, diameter 55 mm in tempered steel and brass washer against corrosion. Perfectly smooth edges for a perfect finish. Cutting capacity: 2mm for metal sheet and 1.2mm for stainless steel. A: 74mm Thread: M20 x 1.50mm Part number: PI-71055 Cookie Cutter: Square D Head Screw Cutter 55 mm – 71055 – Piher Type: