As woodworkers, we ask two simple things of our router bits: Cut cleanly, and stay sharp. But with so many companies manufacturing bits, it isn't always easy to identify the top performers. Associate editor Tom Begnal purchased the same style carbide-tipped cove-and-bead bit from 18 manufacturers and put each one to the test. Used in a router table, each bit made an extensive series of test cuts on edge grain, end grain, and premium and standard MDF. Afterward, the results were rated independently by Fine Woodworking editors. A bit was rated "excellent" if the molding it produced required little to no sanding.