1200N·m 1/2In Electric Impact Wrench Driver, 2x4.0Ah Battery+Charger+4 Sockets

(M) tightening torque and 900ft-lbs (1200N. m) loosening torque - enough to install truck wheels in 3 seconds and remove rusted bolts in 5 seconds. With 2900 IPM and 2400 RPM, it outperforms manual wrenches by 90% efficiency while reducing 80% user fatigue.

eBay