Pneumatic Impact Wrench 1/2 In., Power Source Air Powered, Air Consumption 4.45 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 Industrial Duty, Breakaway Torque 715 ft-lb, Fastening Torque 510 ft-lb, Free Speed 10,000 RPM, Impact Rated Yes, Impact Sound Level 104 dB, Number of Speed Settings 4, Power to Weight Ratio 144.15 ft-lb/lb, Drive Size 1/2 in Square, Drive Type Standard, Retainer Type Friction Ring