This exclusive miniature bit features a 3/16" Diameter ball bearing guide that is much smaller than other ball bearing router bits on the market. Ideal for small fine work and delicate projects such as signmaking, guitarmaking/luthier, toymaking, routing letter edges, flush trimming, plunging tight corners and confined areas with high production., #47220, diameter (D) 3/16, cutting Height (B) 1/2, cutting Height (B) 1/2, overall length (L) 2, replacement bearing 47775, flutes 2, 47220 Miniature flush trim plunge template 3/16 dia x 1/2 x 1/8 inch Shank Carbide Tipped router bit with mini 3/16 dia upper ball bearing