上海诠丰精密工具有限公司系台湾诠丰精密工具股份有限公司在沪独资企业，坐落于上海的西大门风景优美的嘉定区。成立于1997年7月，以生产销售螺纹栓规、螺纹环规、螺纹切削工具等产品为主，以销售螺纹专用设备为辅。为确保产品品质，从德国、日本引进先进的检验设备与校验仪器，确保每一件产品出厂时符合合格证要求。    

CHUAN HONG PRECISION TOOL MFG.CO., LTD. was founded in July, 1983, specializing in manufacturing thread plug gauges, ring gauges, and thread cutting tool. In order to ensure the quality of products, we imported tool microscope, universal length measuring gauge and calibration instruments from Germany to examine our products. Each item leaving the factory was accompanied with a certificate of inspection, and thus CHUAN HONG could grow and develop in the industry. To meet the need and demand of the user, a production line was added to manufacture screw taps in 1989. Furthermore, to strive for the best, we established the computer system in 1992 and reached the goal of computerized management. We have implemented ISO quality system since 1997 and were certified against the ISO 9001 standards in May, 1998. CHUAN HONG Calibration Laboratory is established since 2010 ,through TAF national quality assurance system in 2014.