The easy to use Jasper 280 circle jig bundle is ideal for making speaker cutouts, circular inlays, decorative discs like small tabletops, wooden rings etc. Designed for use with Compact, Trim and Cordless PLUNGE ROUTERS, the 280 router circle guide is made from tough and durable materials providing you with a long-lasting circle cutter is the first true one-pass circle jig. Along with the J601 carbide bit, this bundle allows the craftsman to cut 268 perfect precision circles with diameters from 1 ½ to 18 3/16 inches at 1/16th inch increments.