Faithfull Letter punches are used for hand marking metals and other hard materials. They are useful for stamping personal identification or post codes on tools, cycles etc., as frequently recommended by police and insurers. The letter sizes as shown, relate to the height of the characters. The punches are manufactured from high quality tested carbon steel with double induction hardened heads to ensure high quality impressions. The body is hardened and the head is tempered to prevent chipping when hammered. Each set contains twenty seven punches with the characters and A to Z. Set supplied in plastic box. Size : 8mm (5/16 in).