CMT 854.503.11 Bull Nose Bit, 1/2-Inch Shank, 3/16-Inch Radius 1-Inch Diameter, 7/8-Inch Cutting Length, 3/8-Inch Minor Cutting Length, 2-25/64-Inch Length. For making the edges of stair treads, window sills, shelves and more. Create an oval edge by using a bit with a bead diameter larger than the stock thickness. Non-Stick Orange Shield Coating, Anti-Kickback Design, Equipped with Bearing. 2 SinterHip Hi-Density Industrial Chrome Carbide cutting edges for long-lasting performance.