Bosch 18-volt Variable Speed Brushless 1/2-in square Drive Cordless Impact Wrench (Bare Tool) in the Impact Wrenches department at Lowes.com
Seesii Brushless Power Impact Wrench, Cordless, 1/2 inch Max High Torque 479 Ft-lbs(650Nm), 3300RPM w/ 2x 4.0 Battery, 6 Sockets,9 Drill,6 Screws for Car Home, WH700 - Amazon.com
GardenJoy Cordless Power Impact Wrench - Brushless 1/2 Impact Gun Max Torque 240 Ft-lbs (320N.m) with 3.0Ah Battery, Fast Charger and 4Pcs Sockets - Amazon.com
Brushless Impact Wrench 1/2 inch Max Torque 479 Ft-lbs(650Nm), 3300RPM Cordless | eBay
RIDGID 18V Brushless Cordless 1/2 in. Impact Wrench Kit with 4.0 Ah Battery and Charger R86012K - The Home Depot