Solid Carbide End Mill 8mm 8R0.8x9-27x64xD8D1 (Cutting diameter): 8mm D3 (Undercut diameter): 7. 4mm L2 ( Length of cut): 9mm L3 (Length of undercut): 27mm L1 (Total length): 64mm D2 (Shank diameter): 8mm Z (Number of cutting edges): 4 R Corner radius: 0. 8 Helical pitch: 30 Ultrafine carbide grade specially developed for machining hardened steels Adapted rake angle for safe milling up to 70 HRC Defined cutting edge preparation for homogeneous wear Radius tolerance r 1. 5 mm: 0. 003 mm Radius