... ,Coating: TiN, TiCN, Al2O3, TiALN4,Application: J55, N80, P110Our Carbide API Inserts are used for machining casings, tubings, leadout pipes ... machines.They feature a rigid security and convenient clamping, finished teeth ground to a "narrow" API tolerance and excellent cutting ... of CNC machines.As a majore and professional manufacturer of carbide oil threading inserts in China, we can offer you ...