Part Description: Delivers 0-3,000 RPM with up to 550 ft-lbs of Nut Busting Torque, allowing the removal of the most corroded and stubborn applications. 4-Mode DRIVE CONTROL provides greater control over output speed and power. Includes auto shut-off and bolt-removal mode. Auto shut-off mode prevents over tightening and increases productivity by applying no more than 15 ft-lbs. of torque.