This bit will cut a 'no-drip' Edge on kitchen and vanity counter-tops in one pass. Use in a handheld router, #57120, diameter (D): 1, cut depth (a): 3/4, radius (r): 5/16, cutting Height (B): 1-1/8, Shank (D): 1/2, overall length (L): 3-1/4, B1: 15/16, flutes: 2, D1: 3/4, 57120 carbide Tipped Countertop no-drip with ultra-glide radius bearing guide solid surface 1 inch dia X 1-1/8 x 5/16 angle x 1/2 shank