Tricone Bit, PDC Bits, Drag Bits manufacturer / supplier in China, offering API Rock Drill Bits for Well Drilling/Mining, Tricone Bits, PDC Bits, Rock Reamers/Hole Openers, Drag Bits, Hammer Bits, Single Roller Cones/Cutters, 8 1/2" IADC637 Single Roller Cone Bit for Core Barrel and Piling Foundation, Single Cutters/ Segments / API Roller Bit Palm, Diamond Drill Bit 4 1/2" 5 1/2 Inch PDC Rock Bits/PDC Drilling Bit/ API Rock Drill Bit for Water/Oilfield/Gas Well Drilling and so on.