Self-drilling screws are a type of screws, mainly used to fix colored steel tiles on steel structures, and can also be used to fix thin plates in simple buildings. The tail of the self-drilling screw is in the shape of a drill tail or a pointed tail. No auxiliary processing is required. It can be directly drilled, tapped, and locked on the setting material and foundation material, greatly saving construction time. Compared with ordinary screws, it has higher toughness and retention force, and will not loosen after being assembled for a long time. It is easy to operate by using safe drilling and tapping in one go.