CMT 854.502.11 Bull Nose Bit, 1/2-Inch Shank, 1/8-Inch Radius 7/8-Inch Diameter, 3/4-Inch Cutting Length, 1/4-Inch Minor Cutting Length, 2-17/64-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.