(M) 1/2 High Torque Brushless Impact Gun, 18V Power Impact Driver, 2 5000mAh Battery,5 Sockets, Brushless Variable Speeds for Car/Truck RV/Mower. 3) Reverse mode, in which the machine will automatically stop once the electric wrench detects the nut is loosened, preventing it from flying around to protect the safety of the personnel.
eBay