General description Sealey AK9821 Metal Punch Set is a heavy-duty tool designed for precision punching of holes in various materials including steel, aluminium, brass, copper, and plastic. The set features a compound lever action for ease of use and is supplied in a convenient storage case. Technical specifications Material: Heavy-duty drop-forged and heat treated steel Punch body hardness: 55-60 HRC Depth adjustment gauge: Up to 50mm Suitable for materials: Up to 14 gauge Punch sizes: 3/32", 1/8", 5/32", 3/16", 7/32", 1/4", 9/32" Model No.: AK9821