Titan Tools 15608 3/8-Inch Drive x 8mm Hex Bit Socket is built to last and get the job done. The 3/8-Inch drive socket is constructed of strong chrome plated chrome vanadium and the 8mm hex bit is constructed of durable S2 alloy steel. Detent notches in the drive end provide secure retention of ratchets and extensions. For use with removal and installation of brake caliper mounting bolt. This hex bit socket is made in Taiwan.