S & D Fasteners Co., LTD are producing better Self-Drilling Screws, which are the most convenient, cost-saving and reliable fastener for use. S&D self-drilling Screws has a hardened drill point that will help to drill fast and thread tapping well in structural steel and mild steel. Our high speed drilling point dies are using designed in a manner much the same as high speed steel drill bits.
Our self-drilling screws have following Benefits:
(1) Thrunder Drill Points are easy to start and keep steady on metal surface without sliding.
(2) High quality screws with a sharp edge that increase the speed of drilling the material.
(3) Drilling Points as high performance drill bit to allow faster drill feed rates and easy to remove the scrap.

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