UNOAIR I-60 ( ¾ " ) Composite Impact Wrench ( Twin Hammer) Torque : 1200 Ft-Lb Specification Model : I-60 Square Drive in : ¾ Bold Size Capacity in : ^ mm : 22 Free Speed rpm : 4500 Max Torque ft-lb : 500 n-m : 678 Overall Length in : 9-½ mm : 241 Net Weight lbs : 10.14 kgs : 4.6 Air Inlet ( in) : ¼ Air Hose ( in) : Avg.Air Consumption cfm : 12 m³ / min : 0.34