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At The Same Time, Jinyi Continues To Improve Quality Control System Through Precise Inspection During Every Step Of The Production. With Our Excellent Quality, We Have Already Established Long Term Cooperation With Many Well-known Companies Both In China And Overseas. We Are One Of The First Companies To Implement The Iso9001 & Sgs Certification In Our Industry. with Over 25 Years Development, Ningbo Jinyi Precision Machinery Co., Ltd Is Now One Of The Larger Companies Specialized In Manufacturing Screws, Barrels & Tie Bars. With Our 300 Employees And 5 Factories Based In Ningbo & Zhoushan.