Impact Wrench Power Source Air Powered Air Consumption 4 cfm Air Inlet 1/4 in NPT Air Pressure 90 psi Max Air Pressure 100 psi Min Air Pressure 90 psi Min Hose Size 3/8 in Exhaust Location Bottom Duty Rating Industrial Duty Breakaway Torque 600 ft-lb Fastening Torque 600 ft-lb Free Speed 8 500 RPM Impact Rated Yes Impact Sound Level 99 dB Impacts per Minute 1 200 Number of Speed Settings Continuous Power to Weight Ratio 106.5 ft-lb/lb Max Bolt Capacity 1/2 in