This Ingersoll Rand air impact wrench delivers smooth power unaffected by pressure changes. Tool Weight (lbs.): 2.89, Inlet Size (in.): 1/4, Drive (in.): 3/8, Average Air Consumption (CFM): 2.5, Working Torque (ft.-lb.): 20-150, Noise Level (dB): 97.5, Variable Speed: Yes, Impacts Per Minute (IPM): 1,500, Max. Reverse Torque (ft.-lbs.): 180, Standard Bolt Capacity (in.): 7/16, Min. Hose Size (in.): 3/8, Reversible: Yes, CFM at Load: 11, Speed - No Load (RPM): 10,000, Hammer Mechanism: Single, Tool Length (in.): 6, Max. Torque (ft.-lbs.): 180