Mighty Seven NC-4236Q 1/2" Quiet Impact Wrench Professional grade tool with Twin Hammer mechanism is the most durable available, delivering instantaneous balanced blows to reduce vibration and generate more torque to the drive end of the anvil Four Star rated for power and endurance in professional applications Weighing only 57 pounds yet delivers up to 60 Percent more power than similar specification wrenches with substantially less noise at 83 dBA sound pressure Powerful performance with up to 1,000 feet/pounds capacity in a 1/2" drive 1/4" air inlet Complete accessory product spectrum for professional automotive and industrial applications