$50.99 Hitachi 18-Volt 1/2-in Square Drive Cordless Impact Wrench (2-Batteries) at Lowes.com
DEWALT 18-Volt 1/2 in. Cordless High Performance Impact Wrench (Tool Only) | Shop Your Way 
Bosch 18-Volt 1/2-in Drive Cordless Impact Wrench (2-Batteries Included) at Lowes.com
