Screw punch sets Diamond 12-piece screw punch sets including hand punch and accessories. Optionally with a straight hand punch or a 90° angled hand punch. Suitable for sheet steel (ST 37), plastic and aluminum. Operation: Hydraulic. The design consists of five splitting punches and dies, hydraulic screw (2 pieces), pilot drill and spacer bushing set (3 pieces). Stored in a practical and sturdy plastic case. Contains a straight hydraulic hand punch. Nominal size metric mm 16/20/25/ and 32 mm, with a max. material thickness of up to 2.0 mm and 40 mm with a material thickness of up to 3.0 mm.