This Ingersoll Rand air impact wrench combines a 6-vane, high-output air motor, through-bolt construction, ergonomic handle and housing design to create a tool with increased power and durability. U.S.A. Drive (in.): 3/4, Average Air Consumption (CFM): 10, CFM at Load: 46, Speed - No Load (RPM): 6,000, Blows Per Minute (BPM): 1,025, Max. Torque (ft.-lbs.): 1,250, Working Torque (ft.-lb.): 300 - 1,000, Inlet Size (in.): 3/8, Min. Hose Size (in.): 1/2, Variable Speed: Yes