Features: Sockets made from chrome vanadium steel with hardened S2 bits for enhanced durability Each socket has a drilled end to facilitate retaining ball bearing for use on ratchets and breaker bars Industrial black phosphate finish Specification: 1/4" Drive: T6, T8, T10, T15, T20, T25, T27 and T30 3/8" Drive: T40, T45, T47, T50 and T55 1/2" Drive: T60 and T70