UNOAIR I-600 ( " ) Impact Wrench ( Pin Clutch) Torque : 850 Ft-Lb Specification Model : I-600 Square Drive in : Bold Size Capacity in : 1 mm : 25 Free Speed rpm : 4500 Max Torque ft-lb : 850 n-m : 1153 Overall Length in : 9-11 32 mm : 237 Net Weight lbs : 8.82 kgs : 4 Air Inlet ( in) : Air Hose ( in) : Avg.Air Consumption cfm : 13 m / min : 0.37