These durable Sheffield-made gauges have the same pin arrangement (double on the mortise side and single on the marking side) but different slide mechanisms. The deluxe gauge has a threaded rod with a brass thumbscrew for pin slide adjustment; the standard gauge has a brass post. The screw mechanism on the deluxe model makes fine adjustment easier. Both are made of hardwood with brass rubbing strips and a brass wear plug. Should last for generations. Made by Crown Tools.