DEWALT Powerstack 20-volt Max Variable Speed Brushless 1/2-in square Drive Cordless Impact Wrench (Battery Included) in the Impact Wrenches department at Lowes.com
DeWalt DW059 18V 1/2in Impact Wrench, with Battery and Charger - Roller Auctions
DEWALT 18V Impact Driver, 1/4-Inch, Tool Only (DC825B) - Power Impact Drivers - Amazon.com