Teng Tools sockets are manufactured from strong chrome vanadium steel in accordance with ISO9000 and AS954. They provide excellent torque, whilst reducing the risk of rounding fasteners. This TENT3839 3/8 inch drive 6-point socket set comprises 39 pieces, which are supplied in a plastic case which has a click lock and folding handle. This 39-piece set contains the following: 14 x 3/8in Hex Sockets 8, 9, 10, 11, 12, 13, 14. 15, 16, 17, 18, 19, 21 & 22mm.6 x 3/8in Hex Deep Sockets: 8, 10, 12, 13, 17 & 19mm.2 x 3/8in SparkPlug Sockets 16 & 21mm.1 x 3/8in Reversible Ratchet, 1 x 3/8in Universal Joint.1 x 3/8in Extension Bar 150mm.1 x 3/8in Wobble Extension Bar 75mm.1 x 3/8in-1/2in Adaptor, 1 x 3/8in Hex Bit Adaptor.2 x 1/4in Slotted Bits: 4 & 5.5mm.2 x 1/4in Phillips Bits: PH1 & PH2.2 x 1/4in Pozidriv Bits: PZ1 & PZ2.2 x 1/4in Hex Bits: 5 & 6mm.3 x 1/4in TORX Bits: TX10, TX15 & TX20.