API 3"-26" Steel Tooth Bit for Well Drilling 20years experience in drill bit manufacture High quality& low price API 3"-26" Steel Tooth Bit for Well Drilling As the ... bits,such as PDC bits,TCI bits,rock bits,tricone bits,single cone bits,multicone bits,steel tooth bits ... protectionMaterialAlloy steel ,carbideMarketCanada, USA,Middle east ,Africa,Europe API 3"-26" Steel Tooth Bit for Well Drilling