Impact Wrench Power Source Air Powered Air Consumption 17 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 300 ft-lb Fastening Torque 332 ft-lb Free Speed 15 000 RPM Impact Rated Yes Impact Sound Level 93 dB Impacts per Minute 1 500 Number of Speed Settings 4 Power to Weight Ratio 120.9 ft-lb/lb Max Bolt Capacity 1/2 in