CMT Bull Nose Router Bits give you beautifully finished edges on stair treads, window sills and shelves in one clean cut. For an added touch, try using a cutter with a bead diameter wider than the stock thickness. CMT Bull Nose Bits have bead diameters that range from 1/4" to 1" and all bits have carbide tipped cutting edges, anti-kickback design and trademark orange PTFE Industrial Coating.