Set of interchangeable dies in hardened steel, hardness 56-58 HRC. The ergonomic handle reduces the strain, absorbs vibrations and allows the hand to be kept away from the hammer striking area, and also offers the possibility of mounting 2 dies to make ring seals with just one stop. The dies from 3 to 10 mm have the threaded connection, while from the 12 mm diameter they are locked by bayonet. Suitable for punching leather, rubber, reinforced rubber, cardboard, flexible plastics and synthetic materials.