Hejian Huanyu Petroleum Machinery Co., Ltd.. We are specializedin drill bits, (new and used)Tricone bits,(sealed Journal bearingand open roller bearing )steel tooth tricone bit,TCI triconebit,PDC drill bit ,diamond core bit,bicenter bit,single cone bit ,reamer bit,down hole opener,drag bit,button bit ,tricone bits,steeltooth bit,TCI bit ,pdc diamond bits , single cone bit,diamond corebit ,reamer bit,hole opener ,piling bit ,big diameter bit,drillpipe, Mud pump, stabilizers for water well, oil field,construction, geothermal, directional boring, and undergroundfoundation work all over the world. Our purpose is to sell the bestquality products and the lowest prices. (TCI bits, Milled steeltooth bits).: "8-1/2","9-1/2","12-1/4","15-1/2","17-1/2 to 26”,Wehave been serving the drilling industry since 1998, we provideclients with quality drill bits ,drill pipe and related products.Regarding the drill bits, we can supply the sizes range from 3 " to26 "with a large selection of both, new and used Rock bits, andmatrix bodied PDC drill bits which service drilling operation. Wealso import (buy)used pdc bit ,tricone bit.If you have anyinterests, please don’t hesitate to contact with me. Amy hu,email:hcyamy1987 at gmail (dot)com skype:huchunyi9