Stamp letters & numbers into steel and other metals, wood, leather, vinyl or plastic * Complete set of 26 upper-case letters, ampersand (&) and numbers 0 - 9; professional quality * Easy-to-read characters are 1/8" height (3mm) * High-durability hardened and tempered carbon steel 2-3/8" length with 1/4" square shank * Permanently identify equipment, tools & valuables; customize woodworking projects, imprint initials