Material: These barn door floor rails are made of high-quality iron with a black finish, both attractive and durable. They are robust and have a long lifespan. Fully solid floor: With this sliding door guide, you don't need to drill holes in the floor for bulky hinges. Thanks to the reinforced base, the floor guide will not scratch the floor; it is both sturdy and aesthetically pleasing. Adjustable: Regardless of the size or type of your barn door, the wheels and bearings in the range of motion can be freely adjusted to adapt to the door's thickness. Suitable for all types of sliding doors. Easy installation: Attach two screws with the mounting hardware to the floor plate, place the guide plate, and tighten. You can easily do it yourself without professional tools. Robust and smooth: This sliding door floor guide is robust and secure, maintains balance, prevents wobbling, and allows the barn door to slide smoothly. Reliable door guidance effectively prevents doors from swinging or scratching against the inner wall.