Using these Milwaukee multi - tool blades is easy. First, make sure your oscillating multi - tool is turned off and unplugged. Attach the blade securely to the tool according to the tool's instructions. When cutting, start with a slow speed in the material and gradually increase as needed. For different materials like wood, metal, or cement board, you can use the same blade, but be aware that cutting times may vary. When cutting wood with screws or nails in it, the unique tooth design of these blades will handle it well. As for maintenance, after each use, clean the blade with a dry cloth to remove any debris. Store the blade in a dry place to prevent rusting. If you notice the blade is not cutting as well as it used to, it might be time to replace it. Always wear safety goggles and gloves when using these blades to protect yourself from flying debris.