Hejian Huanyu Petroleum Machinery Co., Ltd.. We are specialized in drill bits, (new and used)Tricone bits,(sealed Journal bearing and open roller bearing )steel tooth tricone bit,TCI tricone bit,PDC drill bit ,diamond core bit,bicenter bit,single cone bit , reamer bit,down hole opener,drag bit,button bit ,tricone bits,steel tooth bit,TCI bit ,pdc diamond bits , single cone bit,diamond core bit ,reamer bit,hole opener ,piling bit ,big diameter bit,drill pipe, Mud pump, stabilizers for water well, oil field, construction, geothermal, directional boring, and underground foundation work all over the world. Our purpose is to sell the best quality products and the lowest prices. (TCI bits, Milled steel tooth bits).: "8-1/2","9-1/2","12-1/4","15-1/2","17-1/2 to 26??We have been serving the drilling industry since 1998, we provide clients with quality drill bits ,drill pipe and related products. Regarding the drill bits, we can supply the sizes range from 3 " to 26 "with a large selection of both, new and used Rock bits, and matrix bodied PDC drill bits which service drilling operation. We also import (buy)used pdc bit ,tricone bit.If you have any interests, please don?? hesitate to contact with me. Amy hu ,email:hcyamy1987 at gmail (dot)com skype:huchunyi9