For fasteners hidden in deep recesses and tight spaces, get the TEKTON 7-pc. 3/8 in. Drive Extra Long Hex Bit Socket Set (Metric). Notched-end sockets lock onto any 3/8 in. drive ratchet, preventing them from being dropped or stuck in fastener. Premium S2 steel bits not only have the length to reach, they have the strength to free stubborn screws. Bit ends are precisely sized for an exact fit and feature chamfered edges that help bits slide into hard-to-see fasteners heads a little easier. If a bit becomes damaged or broken, simply loosening the retaining screw allows it to be removed and repaired or replaced.