Started in 1973, we, Dragon Iron (***** ), have developed to be a fastener group company with manufacturing factories and trading houses both in Taiwan and China for machines, tools and screws. And, we produce screws under the name of ZhuSheng Fastener Manufacture Co., Ltd. for Self-Drilling Screws, (like, Roofing Screws, PVC Window Screws), Thread-Cutting Screws, Self-Tapping Screws, Drywall Screws & Decking Screws, Chipboard Screws / Particle-Board Screws, Machine Screws, Fermacell Screws, For screw production, we control it from wire drawing to heat treatment in house to secure the quality and have it plated or coated outsides by geo-friendly incorporated mills. With our 3-decades of expertise in screw manufacturing and exporting , we highly value the opportunity to co-work with you to pursue the mutual interest in the coming future.