HEBEI YIDA UNITED MACHINERY CO.,LTD., China's Top level-headed & professional manufacturer of rebar coupler and Upset forging machine, parallel thread cutting machine, thread rolling machine and taper thread cutting machine, cold extrusion machine, steel bar hydraulic grip machine, cutting tool, rollers as well as anchor plates since 1992.  Achieved ISO 9001:2008 strictly quality control system certification, and also achieved UK CARES Quality Management System Certification of BS EN ISO 9001. Annual coupler production capacity reaches a leap from 120,000 to 15 million pcs.  Performance great by numerous of Important and National Projects, like Pakistan Karachi Nuclear Power Plant, Guinea Hydro power Plant, HK-Macao-Zhuhai longest cross-sea bridge, Ivory Coast Soubre Hydropower Station, and so on.