Impact Wrench Power Source Air Powered Air Consumption 21 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 Rear Duty Rating Industrial Duty Breakaway Torque 500 ft-lb Fastening Torque 500 ft-lb Free Speed 6 000 RPM Impact Rated No Impact Sound Level 90 dB Impacts per Minute 1 200 Number of Speed Settings 4 Max Bolt Capacity 5/8 in Drive Size 1/2 in Square Drive Type Standard