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 22.2 x 22.2 mm, pre-drill diameter 14.0 mm, max. material thickness 2.00 mm