The tail of the self-drilling screw has a tail-drilling or pointed tail shape, and no auxiliary processing is

　　required. It can be directly drilled, tapped and tightened on the set material and basic material, which

　　greatly saves construction time.Compared with ordinary screws, its toughness and holding force are high,

　　and it will not loose after a long time after combination.

　　It is easy to complete the operation by using safety punching and tapping at one time.It is a kind of screw,

　　which is mainly used for fixing the color steel tile of steel structure and can also be used for fixing of thin

　　late of simple construction.It cannot be used for metal-to-metal bonding and fixing.

　　Standard slot:Round head ,quickly install, save the time.

　　Thread complete: smooth and burr-force the force is even not easy to lose teeth

　　Non-isosceles tail:prevent cracking,reduce screwing resistance high-strength screw