Solid Carbide End Mill 12mm 12R2x29-36x83xD12D1 (Cutting diameter): 12mm D3 (Undercut diameter): 11. 8mm L2 ( Length of cut): 29mm L3 (Length of undercut): 36mm L1 (Total length): 83mm D2 (Shank diameter): 12mm Z (Number of cutting edges): 6 R Corner radius: 2 Helical pitch: 40 6 cutting edges for best performance and an excellent material removal rate Optimized cutting edges and chip chambers to effectively prevent built up edges and chip stuck Ideal chip evacuation, even with high feed rates