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
HART 20-Volt 3/8-inch Battery-Powered Ratchet (Battery Not Included) - Walmart.com
Milwaukee M12 FUEL 12V Lithium-Ion Brushless Cordless Stubby 3/8 in. Impact Wrench (Tool-Only) 2554-20 - The Home Depot