Impact Wrench Power Source Air Powered Air Consumption 4 cfm Air Inlet 1/4 in NPT Air Pressure 90 psi Max Air Pressure 90 psi Min Hose Size 3/8 in Exhaust Location Bottom Duty Rating Light Duty Breakaway Torque 250 ft-lb Fastening Torque 250 ft-lb Free Speed 7 000 RPM Impact Rated Yes Impact Sound Level 90 dB Impacts per Minute 1 600 Number of Speed Settings 3 Max Bolt Capacity 1/2 in Drive Size 1/2 in Square Drive Type Standard Retainer Type Friction Ring