Faithfull Letter and number 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 or number 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.Contents : 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 (9 is achieved by reversing 6).Set supplied in plastic box.Size : 4mm (5/32 in).