Hejian Yinhai Rock Bits Manufacture Co, Ltd. established at 2008 is located in Heiian City, Hebei Provice, China. We are manufacturer of tricone bits, PDC bits, Piling foundation single cones/ rock reamers. Our bits based on high-tech skills and designs are used in explitation of natural gas, crude oil, water well, geological exploration, HDD drilling and piling foundation. There are technical research team, production management team and professional sales team in our company to serve our customers. . Such as Tricone bit, PDC bit, cones, Roller bit, Diamond Core bit, Bi-center bit, hammer bits, drag bits, Hole opener,PDC reamer, HDD vertical reamer, rock reamer and other accessories such as subs, nozzles,adapters, bit breakers,etc.