Use a Two-Flute bit where fine finish is paramount. Two flutes balance the bit, eliminating vibration that degrades the cut finish. Two cuts per revolution yield a smooth surface, but feed rate is slightly reduced. 45200 features a solid carbide cutting edge, #45200, diameter (D): 1/8, cutting Height (B): 7/16, shank (D): 1/4, overall length (L): 2, flutes: 2, 45200 Solid Carbide cutting edge straight plunge high production 1/8 dia x 7/16 x 1/4 inch Shank