Diamond screw punch sets, 7 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. Nominal metric size 16/20/25/32 mm with a max. material thickness of 2.0 mm and 40/50/63 mm with a material thickness of up to 3.0 mm.