Solid Carbide End Mill 20mm 20C0.3x41-54x104xD20D1 (Cutting diameter): 20mm D3 (Undercut diameter): 19. 5mm L2 (Length of cut): 41mm L3 (Length of undercut): 54mm L1 (Total length): 104mm D2 (Shank diameter): 20mm Z (Number of cutting edges): 3 45DEG Corner chamfer: 0. 3mm Helical Pitch: 45 Adapted clearance angle for reliable machining Unequal tooth pitch for smooth running Large chip chambers for good chip evacuation * MADE IN GERMANY * Cooling: Air cooled, dry, water min, water max Tolerance: e8