DEWALT ATOMIC 20V MAX Cordless Brushless 1/2 in. Impact Wrench with 20V MAX XR Premium Lithium-Ion 6.0Ah and 4.0Ah Batteries DCF921BWCB246CK - The Home Depot
DEWALT XTREME 12-volt Max Variable Speed Brushless 1/2-in Drive Cordless Impact Wrench (Bare Tool) in the Impact Wrenches department at Lowes.com