From the manufacturer
Festool FS-1400/2 55" Guide Rail
Festool FS Guide rails are available in eight different lengths from 32 inches to 197 inches (800 – 5000 mm), providing the right rail for every application. The integrated splinterguard aligns perfectly to your cut line, saving set up time and serving as protection against tear out, on cuts both with the grain and across. Guide rails can be easily connected using the accessory guide rail connectors for a rigid, secure and continuous connection. Guide rails make work easier by taking the tool to the work, and save time by eliminating laborious measurements, rework and wasted material. Use the FS 1400 Guide Rail (55 inches) with the Festool TS Plunge cut saw to make precision cuts up to 49 inches long. Connect rails using Festool Guide Rail Connectors to make limitless cuts.
Festool absolutely straight, safe and precise. Festool FS guide rails are available in ten different lengths from 32 to 197 inches, providing the right rail for every application. Simply lay the guide rail on the workpiece and line up the splinterguard flush with the scribe line. Now place your Festool circular saw on the guide rail. The guide rib on the rail engages in the guide slot on the tool. Festool guide rails are equipped with a splinter guard. A rubber lip pressing onto the workpiece along the scribe line ensures splinter-free cut edges. Precise angle cuts up to 45 on both sides. With the FSW angle unit and a guide rail you can quickly set angles of 0 to 45 to either side. This allows you to cut boards and panels to any size at any desired angle, fast, safely, and accurately. A guide rail fixed into place with the special Festool FSZ clamps, and a guide stop adjusted to be free of backlash, provide the basis for ultra-precise work.