An F-clamp with a specially designed head that fits into the slot of power tool guide rails. It is compatible with the Festool FS and Makita guide rail system and many others. The clamp has a capacity of 120mm and a plastic pad on the swivel shoe protects the work surface.
Please check the clamp slot in your guide rail prior to ordering. The spigot is 11mm wide by 7.5mm thick and 60mm long.