End Mills, Carbide Inserts, Carbide Drills manufacturer / supplier in China, offering 10d (D12.5-D40) Interchangeable Drill Exchangeable Drill High Precision Hole Crown Drill, 1.5D Back-Pull Crown Drill Internal Coolant Modular Drill Insert Interchangeable Drill Body Deep Hole Drilling Tools, Excellent Price Interchangeable Cemented Carbide Inserted Crown Drill Modular Blade Special Internal Cooling Bit and so on.