These high performance 12-point sockets are what you need to tackle 12-point fasteners as well as hex and square fasteners. Premium Chrome Vanadium steel tempered with our proprietary heat treatment process to withstand more torque. MaxChrome plating, achieved through thorough polishing and careful application of chrome protective plating, ensures durability and corrosion resistance. Precise 12-point socket with WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage. 24-piece set includes (12) 3/8 in. drive 12-point deep sockets: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm, (12) 3/8 in. drive 12-point shallow sockets: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm. Comes with a billet aluminum socket rail made by Westling Machine in the USA. Capri Tools high performance sockets are trusted by professionals for even the most demanding applications. We use premium Chrome Vanadium steel tempered with our proprietary heat treatment process to make these sockets and drivers. They are durable and withstand more torque. Each socket underwent careful polishing and protective plating process to achieve our own MaxChrome finish. The 12-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage. 28-piece set includes (14) 1/4 in. drive 12-point deep sockets: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 mm, (14) 1/4 in. drive 12-point shallow sockets: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 mm. Comes with a billet aluminum socket rail made by Westling in the USA.