Solid Carbide End Mill 12mm 12R0.2x36-45x93xD12D1 (Cutting diameter): 12mm D3 (Undercut diameter): 11. 8 mm L2 ( Length of cut): 36mm L3 (Length of undercut): 45mm L1 (Total length): 93mm D2 (Shank diameter): 12mm Z (Number of cutting edges): 7 Corner radius: 0. 2 Helical pitch: 40 Variable helical pitch with unequal tooth pitch for smooth running and a soft cut Adapted chip chambers for trochoidal milling Optimized design of the chip breakers for maximum tool life 7 cutting edges for best