1) Product :we specializes in manufacturing:Tricone bits,steel tooth bit,milled tooth tricone bit,tungsten carbide insert rock bit,tri-cone drill bit ,3 cone bits,rotary bit, TCI tricone bit,PDC drill bit ,diamond core bit,bicenter bit,single cone bit , reamer bit,down hole opener,hole enlarger,drag bit,button bit and drilling equipment for petroleum&gas ,water well ,mining and tectonic industries , oil field, construction, geothermal, directional boring, and underground foundation work all over the world.