The Chicago Pneumatic 1in. impact wrench with anvil delivers an impressive 1450 ft.-lbs. of torque and provides the power you need. Drive (in.): 1, Average Air Consumption (CFM): 8 3/4, Speed - No Load (RPM): 5,000, Blows Per Minute (BPM): 700, Working Torque (ft.-lb.): 1,450, Inlet Size (in.): 1/2