DEWALT XTREME 12-volt Max Variable Speed Brushless 3/8-in Drive Cordless Impact Wrench (Battery Included) in the Impact Wrenches department at Lowes.com
DEWALT 20V MAX XR Cordless Brushless 3/4 in. High Torque Impact Wrench with Hog Ring Anvil (Tool Only) DCF897B - The Home Depot
DeWALT 3/4 in. Drive 20V MAX XR High Torque Impact Wrench Kit, Multi-Speed Control at Tractor Supply Co.