Dragon Iron Factory Co., Ltd. is established since 1973. It has over 40 years of fastener manufacture experiences. In the earlier stages, we specialized in production carriage bolts, special fasteners and fasteners for the auto & bike industry. We started to export our products in 1983 and now Dragon Iron has become the major supplier in the world for construction fasteners. In order to provide our buyers with top quality and the best service, the president Mr. Eng-Shan Hsieh introduced our company to the ISO quality assurance system in 1996, we received the certification of "TUV" ISO-9001 in 1997.More