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 90 psi Min Hose Size 3/8 in Exhaust Location Bottom Duty Rating Industrial Duty Breakaway Torque 406 ft-lb Fastening Torque 295 ft-lb Free Speed 11 500 RPM Impact Rated Yes Impact Sound Level 100 dB Impacts per Minute 1 250 Number of Speed Settings 3 Power to Weight Ratio 156.2 ft-lb/lb Max Bolt Capacity 1/2 in