The series PCBN cutting tools is to adopt different type of polycrystalline cubic boron nitride whole with hard alloy welded together 55 degrees diamond cubic boron nitride cutting tools welding, resistance to impact is improved greatly, can be directly instead of carbide cutting tools. This type of PCBN blade can be made into different sizes and cutting edges according to the different requirements of the user's processing materials and the surface finish of the parts.The DNGA series of cubic boron nitride blades are mainly used for machining parts such as cast iron, hardened steel and high manganese steel.