CRAFTSMAN V20 RP Cordless Impact Wrench Kit, 1/2 inch, Battery and Charger Included (CMCF900M1) - Amazon.com
Milwaukee M18 FUEL 18-Volt Li-Ion Brushless Cordless 1/4 in. Hex Impact Driver & 3/8 in. Compact Impact Wrench with Friction Ring 2953-20-2854-20 - The Home Depot
Milwaukee M18 FUEL ONE-KEY 18V Lithium-Ion Brushless Cordless 1 in. Impact Wrench with Friction Ring (Tool-Only) 2867-20 - The Home Depot