36pcs 5/16" 8mm Letter & Number Stamp Punch Set Hardened Steel Metal Tool Kit Set includes separate plastic cases for letter set and number set Permanently identify equipment, tools & valuables; customize woodworking projects, imprint initials Stamp letters & numbers into steel and other metals, wood, leather, vinyl or plastic Complete set of 26 upper-case letters, star symbol (&) and numbers 0 - 8 Larger characters are easy-to-read, 5/16" height (8mm) High-durability hardened and tempered carbon steel