The Mayhew 14 pc. Punch Chisel Set is designed for loosening frozen or tightening pins and keys or knocking out rivets. The punch chisel set is used for cutting, shaping and removing metal softer than the cutting edge of the chisel. This chisel set is for driving out and removing already loosened pins and keys after initial movement by a solid punch. The 14 pc. Punch chisel set is made from stainless steel which ensures long lasting durability and is easy to use.