Square Drive :3/4" - 1" Capacity Bolt Size : 1 - 1/2' (M38mm) Free Speed : 5000rpm / 4000rpm Max Torque : 1330 ft.lb / 1800Nm Air Inlet : 1/2' PT Air Hose : 1/2' I.D Air Consumption : 23cfm Weight : 15.6lbs/7.1kg