Impact Wrench Power Source Air Powered Air Consumption 6 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 Light Duty Breakaway Torque 81 ft-lb Fastening Torque 59 ft-lb Free Speed 15 000 RPM Impact Rated Yes Impact Sound Level 103 dB Impacts per Minute 10 500 Number of Speed Settings 3 Power to Weight Ratio 73.6 ft-lb/lb Max Bolt Capacity 1/4 in Drive Size 1/4 in Square