The Rockler Router Table Spline Jig attaches to a router table to create decorative splines for mitered box and frame joints. It consists of a high-pressure laminate base which attaches to the router table with a pair of miter bars and five-star knobs, and a durable plastic sled which cradles the miter joint and slides in the channels of the base to guide centered spline cuts through the joint. The Router Table Spline Jig can accommodate frames with a standard 11-in. x 14-in. opening, or boxes measuring up to 12-in. x 12-in. x 12-in. Two adjustable fences sandwich the workpiece for extra stability during cutting. An included centering tool aligns the jig with the center of the router bit and attaches to the jig for storage when not in use. The Router Table Spline Jig (item 59288) sells for $79.99.