Square screw hole punch, patented die, with side ejection for the waste piece. Suitable for: sheet steel (ST 37), plastic and aluminum. Operation: hydraulic. Design: with stamp, Suitable for: sheet steel (ST 37), plastic and aluminum. Operation: hydraulic. Design: with stamp, die, hydraulic screw and lock nut. Storage: in a practical, sturdy plastic case. Nominal size 45.5x45.5 mm, pre-drill diameter 20.0 mm, max. material thickness 3.0 mm