Brand new unused original slide on version of TSO Products GRS-16PE Guide Rail Square in original box.  Compatible with Festool, Makita, Triton and Powertec track saw guide rails.  Precision machined blue anodized aluminum with integrated clamp to attach to your guide rails.  Attaches square to your guide rails simply by locking down the clamp latch.  Threaded M6 holes allow you to attach TSO accessories like their parallel guide system and angle accessory.  Notches in the underside of the rail square accommodate rail square clamps from any manufacturer.  Made in USA.