The ESEE Knives Fire Steel is built from 1095 Carbon Steel and heat treated to be used as a fire making tool for use with true flint and charred material. The edges of the Fire Steel also work as a Ferrocerium (Ferro) rod striker, and the center divot is designed to be used as a bow drill socket. The Fire Steel comes packaged in a hinged-lid tin that can be used to make char cloth or other charred materials. Fire Steel size: 1.5" x 3.25" x .188" thick.