General description A comprehensive 171 piece socket set, ranging from 4mm to 32mm, including standard and shank bits along with a variety of accessories. Technical specifications Manufactured from chrome vanadium with satin finish 13 x 1/4""D standard sockets: 4 - 14mm 10 x 3/8""D standard sockets: 10 - 19mm 17 x 1/2""D standard sockets: 10 - 32mm 18 x deep sockets: 4 - 22mm 13 x Star* sockets: E4 - E24 30 x 1/4""D socket bits including Phillips, Flat, PzDrive, Hex, and Star* 24 x 10mm shank bits including Phillips, Flat, PzDrive, Hex, and Star* Compatibility and accessories 3 x 72 teeth ratchets: 1/4""D, 3/8""D, 1/2""D 2 x sliding T-bars: 1/4""D, 1/2""D 4 x extension bars: 2 x 1/4""D, 1 x 3/8""D, 1 x 1/2""D (50 & 100mm long) 3 x plug sockets: 16, 18, 21mm 3 x universal joints: 1/4""D, 3/8""D, 1/2""D 1/4""D socket driver 3 x bit adaptors 7 x Hex keys