1.2flute; 2.ball nose; 3.long length; 4.plain shank EM813 series; 5.flat shank EM823 series. 2flute,ball nose ,long lengthmaterial: carbide;R:0.5~12.5mm;mill diameter:1.0~25.0mm;shank diameter:4~25mm;length of cut:2.5~50mm;overall length:50~180. designed to machine tool steel,alloy steel,mold steel and other high hardened materials;for copy-milling machines