1/2" Dr. Composite Air impact Wrench, Twin Hammer, 500ft-Lb, 680 NmFeatures Twin hammer structure provides greater and stable torque output also reduces vibration. 360 swivel air inlet prevent entanglement of the air hose. Product with 3 stage forward rotation adjustment and 1 stage full power reverse. Additional Info Square Drive: 1 2" Bolt Capacity: 3 4" Torque Range: 204Nm 680Nm Max Torque: 1088Nm Free Speed: 8500Nm Avg. Air Consumption (L min): 113 Air Pressure: 90 PSI Overall Length: 7 1 2" Net Weight: 2. 1kg