BlueSpot 28PCE 3/8" Drive Metric Socket Set (8-24mm) The BlueSpot 28 Piece 3/8" Socket Set is manufactured from chrome vanadium steel for increased durability. The set is heat-treated, hardened, tempered and fully polished. The set features a 3/8" drive ratchet with a contoured handle for increased comfort and knurled sockets to provide a secure grip. Extension bars and a universal joint complement the set which is all securely stored in a metal case. Manufactured from chrome vanadium for increased durability. Shallow and deep sockets. Includes sturdy metal case for quick and convenient storage. Package Contents - 3/8" Drive Sockets: 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22 & 24mm. 3/8" Drive Deep sockets: 10, 11, 12, 13, 14, 15, 16, 17, 18 & 19mm. 2PCE 3/8??? Drive Extension Bars 75mm and 150mm. 3/8??? Ratchet (72 Teeth). To activate the manufacturers lifetime guarantee, you will need to register the product on the Bluespot website within 30 days of purchase.