Diamond screw punch, an innovative splitting punch with three cutting tips: punching waste is split into three parts. Suitable for: sheet steel (ST 37), plastic and aluminum. Operation: manual and hydraulic. Design: punch. Hole diameter 12.5 mm, material thickness 1.5 mm, nominal metric size 12 mm, nominal size PG 7, size 1/2', screw size 6.0x40.0 mm, pre-drill diameter 6.5 mm.