High Quality: The self drilling screws adopts high quality material, which is environmental protection and non-poisonous. In the process of using, there are no toxic substances releasing to ensure your safety. • Deep Thread Design: Our screw thread is very sharp, clean and accurate. And the compact thread is not easy to out of shape and slid in the process of rolling. The deep and phillips flat head can make your working more easily. Our screws accord with standardized metric system.• Feature: Screws have sharp threads that cut into a material such as soft metal sheet, plastic or wood. • Application: Suitable for door handles, faucet, light fixture, knobs, gun smithing, armament repair, plumber and other small repairs around the shop, garage or home furniture fastener etc.• Not Easy to Loose: Our screws are sharp and smooth, not easy to deform and slide during work, and will not loosen easily after use.