UNOAIR I-631 ( ¾ " ) Composite Impact Wrench ( Twin Hammer) Torque : 1000 Ft-Lb Specification Model : I-631 Square Drive in : ¾ Bold Size Capacity in : 1 mm : 25 Free Speed rpm : 9000 Max Torque ft-lb : 1000 n-m : 1356 Overall Length in : 7-^ mm : 200 Net Weight lbs : 4.85 kgs : 2.2 Air Inlet ( in) : ¼ Air Hose ( in) : Avg.Air Consumption cfm : 12 m³ / min : 0.34