Using this Makita saw blade is easy. First, make sure your circular saw is turned off and unplugged. Then, install the blade on the saw following the saw's instructions. When cutting, start the saw and let it reach full speed before making contact with the material. You can use it to cut pipe, angle iron, and other metals. Just keep the saw steady and guide it through the material smoothly. As for maintenance, after each use, clean the blade with a soft brush to remove any debris. Store it in a dry place to prevent rust. Also, avoid using the blade on materials it's not designed for, as this can damage the blade and your saw. And always wear safety goggles and other appropriate safety gear when using the saw.