Learn how to build cabinet door frames using a rail and stile router bit set. Most cabinet doors - especially if they are made in a factory - have frames that are assembled with rail and stile joints, also commonly called cope and stick joints. These joints feature a decorative profile, such as a flat shaker edge, a roundover, or an ogee, that frames the panel, and a groove that contains the panel. Building cabinet doors is easy when you have a rail and stile router bit set to cut these joints.