Znex ZX-2305P 1/2" (12.7mm) Composite Body Impact Wrench with Pin Clutch Maximum torque: Forward: 950 feet-pounds (1289 N-m); Reverse: 1000 feet-pounds (1356 N-m) Bolt capacity: 3/4 inch; air inlet: 1/4 inch Hose size: 3/8 inch Air pressure: 90 PSI Free speed: 7,000 RPM; pin clutch