DEWALT XR Variable Speed Brushless 3/8-in Drive Cordless Impact Wrench (Bare Tool) in the Impact Wrenches department at Lowes.com
Impact wrench - Wikipedia
Amazon.com: Wagan EL2257 12V DC Mighty Impact Wrench, 1/2 inch 12 Volt Electric Impact Wrench Kit, 271 ft-lbs, Tire Repair Tools with Sockets and Carry Case : Everything Else
Using an impact driver for nuts & bolts on mechanical work?
Experts Recommend These 1/2-Inch Drive Cordless Impact Wrenches