Impact Wrench Power Source Air Powered Air Consumption 18 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 General Duty Breakaway Torque 305 ft-lb Fastening Torque 240 ft-lb Free Speed 6 400 RPM Impact Rated Yes Impact Sound Level 104 dB Impacts per Minute 1 200 Number of Speed Settings 3 Power to Weight Ratio 105.5 ft-lb/lb Max Bolt Capacity 3/8 in Drive Size 3/8 in Square