Impact Wrench Power Source Air Powered Air Consumption 41 cfm Air Inlet 1/2 in NPT Air Pressure 90 psi Max Air Pressure 90 psi Min Air Pressure 90 psi Min Hose Size 3/4 in Exhaust Location Bottom Duty Rating General Duty Breakaway Torque 1 770 ft-lb Fastening Torque 1 253 ft-lb Free Speed 6 200 RPM Impact Rated Yes Impact Sound Level 113 dB Impacts per Minute 500 Number of Speed Settings 3 Power to Weight Ratio 84.7 ft-lb/lb Max Bolt Capacity 1 1/4 in