More Product Images Resources ACDelco Tool Manual - ANI405 ANI405 1/2" Impact Wrench 500 ft-lbs Features Handle exhaust design. Forward: 3 speed; reverse: 1 speed. Durable aluminum alloy housing Powerful and durable impact mechanism TWIN HAMMER. Specifications Model Number ANI405 Square Drive 1/2" Square Max. Torque 500 ft-lbs (677 Nm) Standard Bolt Size 5/8" (16 mm) Free Speed 7,000 RPM (/min) Air Consumption 3.9 CFM (110.5 l/min) Overall Length 7-1/4" (184 mm) Air Inlet 1/4" Air Pressure 90 PSI (6.2 Bar) Air Hose 3/8" (10 mm) Sound Pressure Level (LpA) 97.66 dB(A) Sound Power Level (LwA) 108.66 dB(A) Vibration Level 15.98 m/sec^2 Net Weight 5.72 lbs (2.59 kg)