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. 6-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage. 20-piece set includes (14) 1/4 in. drive 6-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 6-point shallow sockets: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 mm.