Using these Lenox reciprocating saw blades is easy. First, make sure your saw is turned off and unplugged. Then, securely install the blade into the saw according to the saw's instructions. When you're ready to cut, start with a slow and steady motion, and gradually increase the speed as you go. These blades are great for cutting metal, wood, and plastic, but remember to use the right pressure for each material. For metal, a bit more pressure might be needed, while for wood and plastic, less pressure usually works better. As for maintenance, after each use, clean the blades with a dry cloth to remove any debris. Store them in a dry place to prevent rusting. If you notice the blade isn't cutting as well as it used to, it might be time to replace it. Always follow safety guidelines when using the saw and blades to avoid any accidents.