More Product Images ACDelco Service Parts List - ANI811 ACDelco Service Parts List - ANI811S ACDelco Tool Manual - ANI811 ANI811 Professional 1" Impact Wrench - 1800 ft-lbs Features Powerful and durable impact mechanism NEW TWIN-HAMMER. Durable aluminum alloy housing Side exhaust design. Forward: 3 speed; reverse: 3 speed. Specifications Model Number ANI811 Square Drive 1" Square Max. Torque 1,800 ft-lbs (2,439 Nm) Working Torque Range 300~1,400 ft-lbs (406~1,896 Nm) Standard Bolt Size 1-27/64" (M36) Free Speed 4,500 RPM (/min) Air Consumption 12 CFM (340 l/min) Overall Length 19-1/2" (495 mm) Air Inlet 1/2" Air Pressure 90 PSI (6.2 Bar) Air Hose 3/4" (19 mm) Sound Pressure Level (LpA) 101.14 dB(A) Sound Power Level (LwA) 112.13 dB(A) Vibration Level 8.69 m/sec^2 Net Weight 27.5 lbs (12.5 kg) Certifications