Using these Milwaukee multi - tool blades is easy. First, make sure your oscillating multi - tool is turned off. Then, securely attach the blade to the tool according to the tool's instructions. When using the blade, start with a slow speed and gradually increase it as needed. You can use it to cut through different materials like wood, metal pipes, and more. Just guide the tool steadily along the cutting line. As for safety, always wear safety goggles to protect your eyes from flying debris. Also, make sure your hands are dry and hold the tool firmly to avoid accidents. To keep these blades in good condition, after each use, wipe the blade clean with a dry cloth to remove any debris. If the blade gets dirty, you can use a mild detergent and water to clean it, but dry it thoroughly afterward. Store the blades in a dry place to prevent rusting. And remember, if the blade becomes dull or damaged, replace it to ensure optimal cutting performance.