Kincrome's Impact Drive SocketRail features 10 Metric Impact Sockets including sizes 8, 10, 12, 13, 14, 15, 16, 17 18 & 19mm. Manufactured from Chrome Molybdenum steel, the sockets are included under a lifetime warranty for guaranteed durability and strength. The Socket Rail is made with trustworthy Peripheral Drive System technology and is complete with a Clip Rail for storage.