Round the lower edge of a counter with the router resting on the upper surface. No need to turn the heavy material over. This tool is especially useful for “job-site” work.(To complete a full 180° bullnose on 1/2," 1," 1-1/2" Or 2" Thick stock, Use the Corner-Rounding bit with the radius bearing.) Furnished with ultra-glide non-marring delrin-sleeved ball-bearing guide.Maximum RPM 14, 000, #57140, diameter (D): 2-5/8, cut depth (a): 1-1/2, Radius (r): 3/4, cutting height (B): 1, shank (D): 1/2, overall length (L): 3, flutes: 2, 57140 carbide Tipped round under solid surface 2-5/8 DIA x 1 inch x 3/4 radius x 1/2 shank