The UnderRail upgrades SpaceRail One by attaching just under the shelf to increase it's LodeStar attachment capacity. It works perfectly with most LodeStar attachments such as sunglasses holders, shoe hooks, angled hooks and computer mounts. The fitment slots of the UnderRail allow it to be positioned against the Wall surface or LodeStar rails on which the SpaceRail One is mounted. This means that the UnderRail can be loaded with as much as 8kg without any flex. Includes 2 x M6x16mm Bolts in Black Stainless Steel Laser Cut Mild Steel construction with Textured Matt Black powder coated Finish. Backed by Five Star Reviews , every SpaceRail One comes with a 5-year warranty and 90 day free returns . Getting your setup right is easy with step-by-step guides , clear technical drawings , and the option to book a live 1-to-1 video session with our UK-based experts. With 0% interest-free finance options through PayPal and Klarna, your complete ride station is ready when you are. Warning: Some LodeStar Parts are not compatible with the UnderRail