Solid Carbide End Mill 20mm 20C0.2x60-74x125xD20D1 (Cutting diameter): 20mm D3 (Undercut diameter): 19. 4mm L2 (Length of cut): 60mm L3 (Length of undercut): 74mm L1 (Total length): 125mm D2 (Shank diameter): 20mm Z (Number of cutting edges): 3 45DEG Corner chamfer: 0. 2mm Helical Pitch: 45 Defined clearance angle for ideal stabilization with high cutting depths Special helical pitch for smooth running and soft cut Extra large chip chambers for an extreme chip volume For process reliable, helical