Amazon.com: Ingersoll Rand 2130 1/2" Drive Air Impact Wrench, 550 ft-lbs Max Torque Output, 7000 RPM, Heavy Duty, Lightweight, Use for Changing Tires, Auto Repair, Black : Everything Else
Performance Tool® W50080 - 1/2" Drive 120 V Corded 7.5 A Impact Wrench - TOOLSiD.com
Aiment Cordless Impact Wrench 1/2 inch, 550 Ft-lbs Max Torque(700NM), 21V 3000RPM Brushless Power Impact Gun, 4.0Ah Li-ion Battery with Fast Charger, 6Pcs Sockets, Electric Impact Driver for Car Home - Amazon.com
DEWALT Variable Speed 1/2-in Drive Cordless Impact Wrench (Bare Tool) in the Impact Wrenches department at Lowes.com