As a member of China Fasteners Association , Ningbo ZhengYu Fasteners Co., Ltd is a joint venture specialized in producing large-sized fasteners , especially the concrete lifting products. Founded in 1999, the company is equipped with over one hundred sets of appropriative devices, including 10-odd sets of inspecting apparatus. The annual producing volume reaches 10, 000 tons. Our fasteners include American standard (ANSI), Germany standard (DIN), British standard (BS), Japanese standard (JIS), National Standard (GB) and non-standard special products. The company is endowed with normative management system, complete devices, advanced technology and strict inspecting *****