Using this Klein socket set is easy. First, pick the right socket size for your job from the 7 - 19 mm options. Then, attach it to a 3/8-inch drive tool. The red flip-lock tray makes it simple to keep track of your sockets. When using, make sure to apply the right amount of force to avoid damaging the sockets or your workpiece. As for maintenance, after each use, wipe the sockets clean with a dry cloth. If they get dirty, you can use a mild soap and water solution, but dry them thoroughly to prevent rust. Since Klein offers a lifetime warranty on material defects and workmanship, if you notice any issues during normal use, reach out to their customer service for assistance.