Using your DeWalt DWA4204B oscillating tool blades is easy. First, check if your oscillating tool is one of the major brands - these blades have a universal fit, so they should work without an adapter. Just attach the blade to your tool. When you're cutting wood with nails, start at a slow speed and gradually increase as needed. The wide blade helps you remove material quickly. As for maintenance, after each use, clean the blade with a dry cloth to remove any debris. Store the blades in a dry place to prevent rust. Also, be careful when handling the blades as they are sharp. If you notice the blade isn't cutting as well as it used to, it might be time to replace it. Enjoy using your DeWalt blades for all your cutting needs!