... and HSS-Co, it has 4~8 times lifetime, and can guarantee uniformity and conformity rate of machined products. It is ... HRC≤25°, discontinuous cutting and worse part fixture. Conforming to ISO K25, can replace machining of materials like M42, ASP60, MPM, HSSCo10 ... etc, and can get 4-6 times lifetime, it has higher performance/price ...