＊Higher rigidity brought by taper neck than existing long neck. ＊Mugen Coating Premium because of high heat resistance, realized long tool life for hardened steels. ＊High effective machining achieved by NS original 3-flute design. ＊Improve performance on high effieient machining by long neck end mills. Reduce flute abrasion progress by chattering suppression. ＊New design (Strong Back Taper) suppresses chattering by controlling milling stress increased by peripheral flute contacts. ＊"Strong" back taper design not available for tool size R1.5 or larger.