This Ingersoll Rand impact wrench has all the performance features you expect from the Ingersoll Rand family of impact tools. This lightweight ergonomic package houses a powerful twin-hammer mechanism. Drive (in.): 1/2, Working Torque (ft.-lb.): 50-500, Speed - No Load (RPM): 9,500, Tool Length (in.): 7 1/4, Tool Weight (lbs.): 4.2, Variable Speed: Yes, Min. Hose Size (in.): 3/8, Noise Level (dB): 96.6, Hammer Mechanism: Twin, Inlet Size (in.): 1/4, Max. Torque (ft.-lbs.): 550, Average Air Consumption (CFM): 4.4, CFM at Load: 22