For an extremely smooth finish, Choose the three-flute configuration. It is especially good to use on laminates that tend to chip Easily. Denotes double ball bearing for added stability, #47118-2, diameter (D): 1/2, cutting Height (B): 1, shank (D): 1/2, overall length (L): 3-5/8, replacement bearing: 47706, flutes: 3, 47118-2 carbide Tipped flush trim 1/2 dia x 1 inch x 1/2 shank 3-Flute Extra-Long