UNOAIR I-851 ( 2" anvil) heavy duty Impact Wrench ( Twin Hammer) Torque : 2000 Ft-Lb Specification Model : I-851 Square Drive in : 1 Bold Size Capacity in : 2 mm : 51 Free Speed rpm : 3700 Max Torque ft-lb : 2000 n-m : 2712 Overall Length in : 14-9 64 mm : 359 Net Weight lbs : 21.61 kgs : 9.8 Air Inlet ( in) : Air Hose ( in) : Avg.Air Consumption cfm : 20 m / min : 0.57