Hole punching tools GW Hydraulic heads Hydraulic heads for round, square and rectangular holes: • maximum steel sheet metal thickness up to 3 mm (at Rm<450MPa, e.g. type St3S) • maximum stainless steel sheet metal thickness 1,5 mm Works with punches - see chart below. Delivered with M10 and M16 pins (not applicable for WON punches). GW hydraulic head i delivered with M10 and M16 pins (not applicable for WON punches). Works with H 800 hydraulic pump and AH 100, AH 500, AH 550, AH 500L hydraulic units. Force: 83 kN at a pressure of 630 bars