ACDelco ARI1258-3 Li-ion 12V 3/8-inch Impact Wrench, 974 in-lbs, 2 battery inlcuded Compact size and light weight with 974 in-lbs (110 Nm) max. torque Durable aluminum gearbox housing Variable speed with reversible control and electric brake switch Powerful in-house motor with external changeable carbon brush Built-in LED light for convenient illumination during work