UNOAIR I-601 ( ¾ " ) Impact Wrench ( Twin Hammer) Torque : 1200 Ft-Lb Specification Model : I-601 Square Drive in : ¾ Bold Size Capacity in : 1-½ mm : 38 Free Speed rpm : 5000 Max Torque ft-lb : 1200 n-m : 1672 Overall Length in : 8-½ mm : 216 Net Weight lbs : 11.24 kgs : 5.1 Air Inlet ( in) : Air Hose ( in) : ½ Avg.Air Consumption cfm : 15 m³ / min : 0.42