Standard sheet metal hole punch system. Suitable for sheet steel (St37), plastic and aluminum. Sheet metal hole punch for manual and hydraulic operation. To use the 9.5mm draw bolt, the hole diameter 9.7mm must be drilled with the pre-drill (50360183). For the 19.0mm draw bolt, the hole diameter 20.5mm must be drilled with the pre-drill (50344030). Maximum material thickness (St37) 3.5mm.