Using your GearWrench 10 - Piece 3/8 - Inch Drive 6 - Point Deep Universal Impact Metric Socket Set is easy. First, select the right socket size for your fastener. Just match the size marked on the socket with the size of the fastener. Then, attach the socket to your 3/8 - inch drive tool. When you're working, make sure to apply the force steadily. Since these sockets have an off - corner loading design, they're less likely to round the fasteners, but still be careful not to use excessive force. As for storage, use the included socket rail. It helps keep your sockets organized and easy to find. To maintain your sockets, after each use, wipe them clean with a dry cloth. If they get dirty or greasy, you can use a mild detergent and water to clean them. Just make sure to dry them thoroughly to prevent corrosion. And remember, these sockets are made for professional use, so use them in appropriate applications.