Loosens Rusted Frozen Nuts Bolts and Screws. Unique design delivers over 200 ft. lbs. of "Shock Torque." Can be reversed to tighten. Can also be used with impact sockets!. Includes: 3/8" sq. drive with 3/8" drive bit holder; #1 #2 #3 #4 Phillips and 3/8" straight slot bits.