Makita 199232-5 Guide Rail Adaptor for DHS660 This adaptor can be attached to Makita circular saws, which allows you to use the circular saws with the Makita SP6000 guide rail system for precise, straight routing cuts.The adaptor is compatible with models DHS660. Features and Benefits: Guide rail adaptor compatible with DHS660. Allows more accurate cuts after adapting the DHS660 models to guide rails.