... wear-resistant/high impact-resistant application/high precisio precision boring tool micro boring tools Super-hard processing of professional, special, non-standard, ... like M42, ASP60, MPM, HSSCo10 etc, and can get 4-6 times lifetime, it has higher performance/price ration. Comparing ... . Comparing with HSSE\HSS-AL and HSSCo, it has 4~8 times lifetime, and can guarantee uniformity and conformity rate ...