These rail connectors are designed to securely fix two guide rails together. Guide Rail Connectors are designed to join guide rails together to allow the user to make longer cuts while maintaining the accuracy they desire Guide rail connector set suitable for joining guide rails that use the T-LOCK guide rail system. This system is used by many of the major power tool brand including Makita, Festool, Milwaukee, Metabo, Evolution and many more. Our guide rail connector is made of durable steel structure, not easy to break or deform, with smooth surface and no burrs. Add our track connector to both rails for maximum connectivity and longer full straight or beveled cuts. This guide rail connector is compatible with 118", 55" rails and 39" rails. Includes 2 Pairs Guide Rail Connectors 8 x Grub Screws Hex Key