We are the professional manufactory of various screws have been working in this field for many years in Taiwan.
We are able to produce 304.302.305.316stainless drilling screws, Bi-metal screws, and the drill bit dies of self drilling screws. The wire diameter of our products could be made from 2.8mm to 5.1mm and the length could be made from 9.5mm to 300mm.
We have confidence to offer you high quality and competitive prices. Besides, we accept custom-made products. If you offer drawing and specification detailed.
If you are interested in our products, please do not hesitate to contact with me. I believe there will be a good long term cooperation between us. ... 
Taiwan