3 Review(s)

These screws work as both a drill bit and a fastener. Self-drilling screws do not need a pilot hole because of the drill bit end. They work quite well at fastening thin pieces of metal together and were designed for exactly this reason. Why drill a bunch of holes into a metal sheet wearing out a drill bit, when you can use these guys. They also have much variance in types and uses than tapping screws. Accord with human body engineering design, perfectly match with the form of your gripping palm. Adopting the high-density spring make you strip wire more comfortable, and not easy to fall.