Using these DAGGERZ self - drill screws is easy. For drywall or wood - to - metal applications, you don't need to pre - drill into the metal because of the self - drill point. Just line up the screw with your target and start turning. The Phillips drive will center itself, making the process smoother. When working with softer materials, the bugle head will sink in flush. Remember to use the right tools to avoid damaging the screw or the material. As for maintenance, keep these screws in a dry place. Since they have a 1000 - hour salt - spray coating for corrosion resistance, they'll last a long time if stored properly. But try to use them as soon as possible after opening the package to keep them in the best condition.