Kincrome's Impact Drive Socket Rail features 10 Metric Impact Sockets including sizes 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8". 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.