Complete set of deep Bi-Hex (12pt) 3/8"D sockets in a useful range of sizes from 6mm to 22mm. Ideal for car engine maintenance and anywhere that regular sockets are too short for access. Bi-Hex head provides 12 points of potential contact making it quicker and easier to seat the socket over most types of fastener, including square-head nuts and bolts. The size is engraved on each socket for easy identification. A quality set manufactured from satin finish chrome vanadium supplied on a socket rail for convenient, easy access storage.