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 20V MAX XR Cordless Brushless 3-Speed 1/4 in. Impact Driver (Tool Only) DCF887B - The Home Depot
DEWALT 20V MAX XR Impact Driver, Brushless, 3-Speed, 1/4-Inch, Tool Only (DCF887B) - Amazon.com