Amana Tool 49518 Corner Rounding 1-1/2 Diameter by 1/2-Inch Radius by 1/2-Inch Shank 2 Flute Router Bit Carbide Tipped, Industrial Quality Corner Rounding with Ball Bearing Guide 1/2-Inch Shank 1-1/2 Diameter, 3/4-Inch Cutting Height, 1/2-Inch Radius For use only in a table mounted router.