YBM253 grade is suitable for roughing of heavy stainless steel parts with high cutting depth and high feed rate under the condition with great impact. SNMG120408-ER has the characteristics of high-quality insert material, replaceable insert design, high cutting efficiency and wide applicability. It is a commonly used turning tool that can meet the turning needs of different materials. At the same time, according to the specific turning requirements, the insert size and other parameters may be adjusted1. Ultra-fine grain coating technology provides better wear resistance and toughness; 2. Improved remain internal stress design ensures good toughness and anti-cracking performance; 3. Polishing treatment on coating surface makes it suitable for cutting adhesive materials. 4. With gradient carbide substrate insert has better impact resistance and cutting edge strength.