The general tools and instruments 1271i arch punch is the ideal punch tool for punching a 3/4-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. General tools - the precise tool for doing the job exactly right. Offering over 1,000 tools, were proud to provide tradesmen, craftsmen and diyers around the world with a broad range of affordable, specific-purpose mechanical hand tools and precision measuring and inspection tools.