Expert Quality, manufactured from chrome vanadium steel that's hardened and tempered with a polished finish. With a hole in the drive end of the socket for ball retention. Packed on socket retaining bar with hanging hole at each end. Features and Benefits • Expert Quality • Contents:1/4" sq. drive: E6, E7 and E8 and 3/8" sq. drive: E10, E12, E14 and E16 • Chrome vanadium steel, hardened, tempered, chrome plated and polished for corrosion protection • Packed on socket retaining bar with hanging hole at each end Contents 3 x Socket, 1/4" Sq. Dr.: E6, E7, E8 4 x Socket, 3/8" Sq. Dr.: E10, E12, E14, E16