The Wonder Fence by Incra is a heavy-duty, one-fence solution for ALL of your router table operations, including raised panels, molding, shaping, jointing, and all other general purpose cuts. When attached to the INCRA Jig Ultra (sold separately), it also produces perfect Box Joints and Dovetails in all styles and sizes including the famous INCRA Double and Double-Double Box Joints and Dovetails. You won't find a warp, bend, or bow in the Wonder Fence. All critical surfaces are machined perfectly flat to insure that both infeed and outfeed fences remain perpendicular and parallel at all offset and gap settings. The offset adjustment wedges have been machined from solid blocks of aluminum to achieve precise offset adjustability. It also attaches to the Incra TS-III table saw fence for all joinery operations and excellent tall board support.