Abstract: The present invention facilitates the fabrication of an unlimited variety of dovetail joints without the use of standardized template devices. Additionally, the device is capable of supporting a workpiece on both sides of the router bit cutting edge and adjusting the angular orientation of the guiding fence in relation to the axis of directional translation. The device is comprised of a router table and a slideably coupled positioning apparatus. The router table comprises a tabletop and means for securing a router so that the router's cutting bit extends upwardly through a central orifice. The upper surface of the router table has two longitudinal guide grooves which are parallel to one another and equally spaced on opposite sides of the central orifice. The positioning apparatus is comprised of a guide fence unit with two pivotally secured parallel runners.