UNOAIR I-46 ( ½ " ) Impact Wrench ( Twin Hammer) Torque : 450 Ft-Lb Specification Model : I-46 Square Drive in : ½ Bold Size Capacity in : ¾ mm : 19 Free Speed rpm : 7000 Max Torque ft-lb : 450 n-m : 610 Overall Length in : 7-¼ mm : 184 Net Weight lbs : 5.73 kgs : 2.6 Air Inlet ( in) : ¼ Air Hose ( in) : Avg.Air Consumption cfm : 6 m³ / min : 0.17