Looking for a versatile, top-quality socket set that will last you a lifetime? Look no further than the Channellock Standard and Metric 3/8 In. Drive 6-Point Shallow Ratchet & Socket Set. This 20-piece set is constructed of durable chrome vanadium and includes everything you need for all your quick-release ratcheting needs. The ratchet is 8 inches long and has a low profile head and works with any 3/8 in. drive sockets. The easily switched lever changes the ratchet's function between loosening and tightening, while the button above will quick-release the socket to swap it out for another size. Superior performance comes from its 72-tooth, 5-degree swing. The sockets themselves are 6-point standard, each having a textured band which provides superior grip so they won't slip out of your hands. They're also color-coded to easily identify the system: red for imperial, which are measured in fractions of an inch, and blue for metric, measured in millimeters. Nine sockets from each system are included, giving you a total of 18 size choices. The set also includes a handy 6-inch extender, which allows you to reach further and get into tighter spaces. The entire set comes with a lifetime warranty, so you can be sure it's durable and built to last. It also comes packed in a plastic storage rack, which makes it perfect to hang or store in your toolbox, garage, or workshop. Socket sizes included: SAE 1/4 In., 5/16 In., 3/8 In., 7/16 In., 1/2 In., 9/16 In., 5/8 In., 11/16 In., and 3/4 In. and metric 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, and 19 mm.