The Bahco S330 1/4in & 3/8in Drive Socket Set Metric with dynamic drive profile. Made from high performance alloy steel with a matt finish. Confroms to DIN 3120/ ISO 1174. Supplied in a plastic case, that is made from oil and temperature resistant polypropylene. Contents: 12 x 3/8in Hex Sockets: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 & 22mm.1 x 3/8in 60 Teeth Quick Release Ratchet.2 x 3/8in Extension Bars: 75mm (3in) & 150mm (6in). 1 x 3/8in Universal Joint.1 x 3/8in x 1/4in Bit Holder.2 x 3/8in Spark Plug Sockets Hex: 16mm (5/8in) & 21mm (13/16in).1 x 1/4in Spinner Handle, 2-Component Handle.1 x 1/4in x 1/4in Bit Holder.3 x 1/4in Slotted Bits: 4, 5.5 & 7mm.4 x 1/4in Phillips Bits: PH1, PH2, PH3 & PH4.6 x 1/4in Hex Bits: 3, 4, 5, 6, 7 & 8mm.