48-32-4401H DRVNG KIT W/BONUS 29 assorted bits used for driving a variety of screws for power drills and screwdrivers Features heat-treated proprietary steel that is strong and durable. Allows shock absorption Forged tips provide maximum grip to help eliminate the possibility of slipping and stripping screws Manufactured with custom engineered steel. Heat treated for high shock resistance Geometric shock absorption zone that extends life. 29 bits and storage case included