Located in Zhengzhou City, capital of Henan Province, China, 3U Super Hard Products Co., Ltd -??U??established in 1995,is a  high-tech enterprise with several years of experience specialized in producing  and supplying of all kinds of diamond tools  required by the industry of petroleum and geological drilling bits, for cutting and polishing genuine diamond,gemstones,  ceramics, marbles, glasses and others tools for rubbing and precision grinding with a wide range of applications.