This tough Ingersoll Rand air impact wrench is great to have around the auto shop. Its single hammer impact mechanism is durable and it boasts an easy-to-use forward/reverse power regulator for control. Long-life aluminum housing. Average Air Consumption (CFM): 4.3, CFM at Load: 24, Noise Level (dB): 90.3, Reversible: Yes, Max. Torque (ft.-lbs.): 450, Variable Speed: Yes, Drive (in.): 1/2, Speed - No Load (RPM): 7,400, Min. Hose Size (in.): 3/8, Tool Length (in.): 7 1/8, Working Torque (ft.-lb.): 25-200, Inlet Size (in.): 1/4, Tool Weight (lbs.): 5.3