Hejian Tengda Petroleum Supplies Co.,Ltd. .Our factory specialized in manufactureing and exporting of rock bit and PDC bit with all IADC Code and assemble bits..In addition,we produce drilling rig,mud pump ?Diamond Drill and other accessories. And we also sell and buy scrap bits.  
We keep high quality and competitive factory price ,beautiful design, manufacturer strength. We believed that we are your best choice. Hope we have the opportunity to cooperation.
If you have any questions .please feel free to contact us.