Carbide Insert, Holder, U Drill manufacturer / supplier in China, offering Mgmn150/200/250/300-H Carbide Grooving Inserts- Precision Finishing Cut-off Inserts for Hardened Steel, CNC External Turning Mgmn150/200/300-Dr Carbide Grooving Insert for Hardened Steel CNC Machining, CNC Lathe Turning Tools Mgmn150/250/300-G External Grooving Carbide Insert OEM Customized Turning Tool and so on.