Impact Wrench Power Source Air Powered Air Consumption 37 cfm Air Inlet 1/4 in NPT Air Pressure 90 psi Max Air Pressure 90 psi Min Air Pressure 70 psi Min Hose Size 3/8 in Exhaust Location Bottom Duty Rating General Duty Breakaway Torque 550 ft-lb Fastening Torque 450 ft-lb Free Speed 10 000 RPM Impact Rated Yes Impact Sound Level 88 dB Impacts per Minute 1 600 Number of Speed Settings 4 Max Bolt Capacity 9/16 in Drive Size 3/8 in Square Drive Type Standard