When you need professional quality fit and finish, you need the Powerbuilt 1/2 Inch Drive 30 MM 6 Point Deep Socket. Powerbuilt sockets are made from high-grade chrome vanadium steel and feature a mirror-polished chrome-plated finish for superior durability and corrosion resistance. The 30mm socket is cold forged, heat treated and produced with precision tolerances. The socket also features oversized high visibility size marking for easier recognition. The socket has chamfered edge for easier and stronger mating to fasteners. All Powerbuilt sockets exceed ANSI standards for quality and durability.