Diamond screw punch sets, 11 pieces in various sizes. Suitable for sheet steel (ST 37), plastic and aluminum. Manual and hydraulic operation. Design: consisting of splitting punches and dies. Stored in a practical, sturdy plastic case. Additional equipment with ball bearing tension screws (encapsulated), pre-drill and assembly paste. Nominal metric size 12 mm with a max. material thickness of 1.5 mm, nominal size 16/20/25 and 32 mm, with a material thickness of up to 2.0 mm and 40 mm with a material thickness of up to 3.0 mm.