A popular tool also available in a smaller, easy-to-display clam-shell package. Simply strike with a hammer. Each impact turns the bit 20° and develops up to 200 ft-lbs torque to free rusted or frozen screws. Can also be used with 1/2" drive impact sockets. Includes #2, #3, #4 Phillips and 3/8" straight bits with 5/16" hex drive.