Use this bit for rounding edges where there's access to a flat surface for the ultra-glide non-marring bearing to reference. Used in concert with either the counter-top ('no-drip') design bit or the Corner-Rounding bit with a radius bearing, this bit will produce a no-drip edge or a bullnose in two passes, #57147, diameter (D): 3/4, radius (r): 1/8, cutting Height (B): 3/8, shank (d): 1/2, overall length (L): 2-5/16, flutes: 2, 57147 carbide Tipped corner Rounding with ultra-glide ball bearing guide solid surface 3/4 dia x 3/8 x 1/4 radius x 1/2 inch Shank