Parallel Guides are for use with FS or FS2-KP Guide Rails (sold separately). Optional Parallel Guide Extensions also available. The Parallel Guides greatly enhance the capability of the Festool Guide Rail System by providing a faster, easier, smarter way to create consistent rip cuts. The Parallel Guides offer consistent rip cuts using two adjustable stops that engage the edge of the material parallel to the cut line. Greatly enhances the Guide Rail System by providing a faster, easier, smarter way to make consistent rip cuts Attaches easily and clamps quickly to the guide rail, ensuring secure and consistent cuts Easy to read scale for cuts up to 650mm ( 25-19/32") Easily calibrated against the guide rail splinterguard for precise, splinter-free and consistent ripping