Chicago Pneumatic Impact Wrench,Air Powered,6500 rpm CP7769, 1 - Kroger
MTS 53254 1/2-Inch Drive Aluminum Pneumatic Air Powered Impact Wrench, Standard Anvil, Twin Hammer, with Max Torque of 680, Working Torque Range 25-400 ft-lbs, Weight 6 lbs. - Amazon.com