General Tools 1271M Arch Punch, 1 Inch The General Tools and Instruments 1271M Arch Punch is the ideal punch tool for punching a 1 inch hole The punch works on leather, rubber, canvas, plastic, sheet metal, gasket material, cardboard and softer metals The internal punch features an inside taper for clearance The punches are heat treated forged steel, ensuring long lasting performance Because of this heat treatment, the cutting edge will stay sharper longer