Tricone Bit, PDC Bit, Hole Opener manufacturer / supplier in China, offering 12 1/4′′ 311mm IADC 537 Tricone Rotary Drill Rig Bit, 9 7/8′′ 250mm IADC 837 Tricone Geological Drilling Three Roller Cone Bit, 9 7/8′′ IADC 737 Tricone Drill Bit Exploration Water Well Drilling Bit and so on.