Solid punches are used for loosening frozen or tight pins and keys or knocking out rivets. Cold chisels are used for cutting, Shaping and removing metal softer than the cutting edge of the chisel. Pin points are used for driving out and removing already loosened pins and keys after initial movement by a solid punch. Made of S2 stainless steel. Made in the USA This 6 piece chisel set includes the following: Cold chisel cutting widths: 1/2", 5/8". Center punch stock size: 3/8". Pin punch point sizes: 3/16", 1/8". Solid punch point size: 3/16". All included in a handy storage case.