Based In Zhengzhou City, Capital Of Henan Province, China, 3u Super Hard Products Co., Ltd -“3u” Is A High-tech Enterprise With Ten Years Of Experience In Specialized Production And Supplying Of All Kinds Of Diamond Tools Required By The Industry Of Petroleum And Geological Drilling, For Cutting And Polishing Gemstones, Ceramics, Marbles, Glasses And Others Tools For Rubbing And Precision Grinding With A Wide Range Of Applications.