API Threading Chasers, Carbide Inserts for Tube Machining, Bar Peeling Inserts manufacturer / supplier in China, offering Deep Hole Drilling-Indexable Gun Drill-Drill Head-Djq-Series, Deep Hole Drilling-Indexable Counterbore Drills- Drill Head-Jk40, Deep Hole Drilling-Indexable Deep Hole Counterboring-Counterboring Head-Jk34.5 and so on.