Complete set of deep single Hex (6pt) 3/8""D sockets in a useful range of sizes from 10mm to 17mm. Ideal for car engine maintenance and anywhere that regular sockets are too short for access. The six-sided socket head drives from the flats to provide more torque, useful for freeing seized nuts & bolts, whilst avoiding the risk of rounding. The socket has slightly convex internal faces and drilled out corners, for a solid grip, even on damaged fastener heads. Manufactured from durable chrome vanadium steel with a polished finish and supplied on a socket rail for convenient, easy access storage. Socket sizes: 10, 11, 12, 13, 14, 15, 16, 17mm. Single Hex (6pt) x 63mm long. Large easy to read size markings for quick socket selection. Manufactured from polished chrome vanadium. Supplied on a socket rail.