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Hebei Zhongcheng Drill Bit Manufacture Co.LTD. .(SRF) was established in 1997. It is a privately owned and proudly company. We have grown to become a leading manufacturer of tricone bit and supplier of high quality drilling tools & equipment, and we excel in designing, manufacturing, and distributing construction industry drilling tools as well as finding custom solutions to complex problems. Our goal is to provide our customers with the best quality tools, accessories and service in the industry. We are supported by many years of experience, trained professionals and a full machine shop. Hebei Zhongcheng Drill Bit Manufacture Co.LTD, our brand “SRF” maintains a strong reputation in the construction, exploration, water well, geothermal, mining, and oil & gas industries as a company that can provide dependability and high quality products at excellent value. Hebei Zhongcheng Drill Bit Manufacture Co.LTD was established in 1997. It is a privately owned and proudly company. We have grown to become a leading manufacturer of tricone bit and PDC bits and supplier of high quality drilling tools & equipment, and we excel in designing, manufacturing, and distributing construction industry drilling tools as well as finding custom solutions to complex problems. SuRuiFeng a registered brand -“SRF”brand bits includes:Tricone Bit( steel tooth & TCI bit)Ÿ PDC Drill Bit (matrix & steel body)Ÿ Step Drag Bit（3 wings,4 wings）Ÿ Reamers(Hole opener):Rock reamer,Ÿ Open reamer,Barrel reamer, Rock AugerŸ Diamond Core Bits:PDC diamond bit with Natural diamond ,Thermal Stable Polycrystalline (TSP), combinationŸ Stabilier,Bit breakers,Bit subs, NozzlesŸ Single cutters/tricone cones/cutters, Drill pipe,drill rodOther related tools: Oil Vibrating Sieving Mesh, Mud Hydrometer,pin and box tap,Slips,ElevatorNEW Products:HDD ROCK REAMERS,TCI type,steel tooth bit,Eagle claw bits ,openers,HDD drill pipes