Torque Jack Pro is equipped with twin end to end worm gear needle bearings and dual carrier bearing for the slave gear to eliminate friction with in the gear / casing.
This elimination of friction allows Torque Jack Pro to lift dual jack trailers loaded or unloaded with the proper drill. The best drill for this unit is the DeWalt DCD1007. It is the most powerful drill DeWalt offers and is a 3 speed for faster performance. The Milwaukee 1/2 18 volt fuel is a great option as well but is only a 2 speed.