The Mayhew Pro Punch and Chisel Kit is designed for loosening frozen or tightening pins and keys or knocking out rivets. The punch and chisel kit can be used for cutting, shaping and removing metal softer than the cutting edge of the chisels. The chisels are for driving out and removing already loosened pins and keys after initial movement by a solid punch. All the punches and chisels in the set are made from stainless steel, which ensures long-lasting durability and is easy to use.