Make precise and refined imprints on leather, wood, copper, brass, aluminum and mild steel Carbon steel with differential heat treatment to achieve optimal performance and durability. 62 HRC hard stamping end produces high quality imprints and keeps the edges sharp. 42 HRC tough hammering end excels at absorbing repeated hammer strikes and maintaining durability Large, true-to-size, and precisely machined 4mm. letters/numbers Find the right stamp and orientation easily with engraved sizing and letter identification on the front side of each stamp Colour:As shown Material:carbon steel Package Contents: 36 * stamps (letters A-Z in uppercase, the ampersand &, and numbers 0-9, interchangeable stamp for numbers 6 and 9) 1 * heart and 1 * Stamping Fixture Strike Jig Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.