Using these Lenox METALWOLF reciprocating saw blades is a breeze. First, make sure your saw is turned off and unplugged. Then, install the blade securely in your saw according to the saw's instructions. When you're ready to cut, start at a slow speed and gradually increase as needed. Keep the blade straight and apply steady pressure. As for maintenance, after each use, clean the blade with a dry cloth to remove any debris. If the blade gets dull, it's time to replace it. And always store the blades in a dry place to prevent rust. Remember, these blades are designed for metal cutting, so don't use them on other materials.