Square screw punch, patented die, with side ejection for the waste piece. Suitable for: sheet steel (ST 37), plastic and aluminum. Operation: Manual and hydraulic Design: With punch, die, ball bearing tension screw (encapsulated), lock nut and adapter for hydraulic operation. Storage: In a practical, sturdy plastic case Nominal size 12.7x12.7 mm, pre-drill diameter 10.0 mm, max. material thickness: 1.75 mm