Impact punches are made of carbon steel, high strength and high hardness, durable. Set contains 26 letters (A-Z), 9 numbers (0-9) and 1 symbol "&". Length of stamp: approx. 6 cm. Diameter of the stamp: approx. 6 mm. All are well packaged in a plastic case for easy storage and transport. Ideal for working on soft metal, leather and wood etc. An indispensable tool for craftsmen, easy to use.