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, #45238-01, diameter (D): 19/32, cutting Height (B): 3/4, shank (D): 1/4, overall length (L): 2-1/4, flutes: 2, 45238-01 carbide Tipped straight plunge high production 19/32 dia x 3/4 inch x 1/4 shank