Using the DeWalt DWMT45434 tool set is easy. Just pick the right 1/4 - inch, 3/8 - inch, or 1/2 - inch tool for your job, whether it's a ratchet, wrench, socket, or specialty bit. When using the tools, make sure to hold them firmly by the knurled control ring for a better grip. The DirectTorque technology helps you work more effectively on fasteners. As for maintenance, keep the tools clean after each use. You can wipe them with a dry cloth. Thanks to the polished chrome vanadium finish, they're corrosion - resistant, but it's still a good idea to store them in a dry place. And don't worry, this tool set comes with a full lifetime warranty, so if you have any problems, you're covered.