Hebei Solidkey Petroleum Material Co.,Ltd . We are specialized in drill bits Tricone bits,(sealed Journal bearing and open roller bearing )steel tooth tricone bit,TCI tricone bit,PDC drill bit ,,single cone bit , reamer bit,down hole opener,drag bit,button bit ,stabilizers for water well, oil field, construction, geothermal, directional drilling, 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. My skype :lisalee1140,my mobil and whatsapp : 0086-15100823486,email is lisa@skbit.com.Welcome to your inquiry!!!