Solid Carbide End Mill 8mm 8x22-27x63xD8D1 (Cutting diameter): 8mm D3 (Undercut diameter): 7. 5mm L2 ( Length of cut): 22mm L3 (Length of undercut): 27mm L1 (Total length): 63mm D2 (Shank diameter): 8mm Z (Number of cutting edges): 4 Helical pitch: 38 Extra large chip chambers for ideal chip evacuation Unequal tooth pitch combined with variable helical pitch for smooth running Reinforced face with 2 cutting edges to the center Perfected for high radial depth of cutting and full slot milling