Festool FS Guide rails are available in eight different lengths from 32" to 16.5' (800 - 5000 mm), providing the right rail for every application. Simply lay the guide rail on the workpiece and align the splinter guard flush with the scribe line. Now, place your Festool plunge cut saw on the guide rail. The guide rib on the rail engages the guide slot on the tool, ensuring precision cutting every time. You save time and money by eliminating laborious measurements, rework and wasted material.