[Product Description] S-PRO series is mainly used for cutting difficult-to-cut materials such as stainless, titanium, nickel and hastelloy in the aerospace field. A deep chip evacuation space of the S-PRO helps to cut difficult-to-cut materials, which facilitates chip evacuation and provides excellent surface finish. [Product Specification] Flat end mill : D1 ~ D20 Ball end mill : D3 ~ D20 C/R end mill : D1 ~ D20 [Product Model] Flat : 4SUE, 4SUEA Ball : 4SUB C/R : 4SUR, 4SURA [Product Use] * The cutting edge type of S pro series is unequal flute and it is suitable for cutting difficult to cut materials like alloly steels, stainless steels, Titianium, Inconel etc. * 4SURA, 4SUEA are specialized to cut Inconel. * Strong wear-resistance by adapting S-pro coating.