The special design of the end of the drill point allows the self-drilling screw to integrate three functions: "Drilling", "Tapping" and "Locking" on one screw. Its surface hardness and core hardness are higher than ordinary self-tapping screws. The biggest advantage of self-drilling screw is it can save construction time and cost effectiveness. Therefore, the field of application becomes wider than we expected before.
Drill — The drill point of the end tail can drilled the surface of the mating parts directly.
Tapping —Tapping in the hole directly to create internal threads
Lock — No need to tap holes in advance to lock objects
Self-drilling screws could reduce the working process and usually used in construction, decoration, roofing, glass and other fields. Therefore, self-drilling screws also called window screws and roof screws.