【High-quality carbon steel material】The main body of the floor guide rail is made of high-stability carbon steel to ensure strength and durability, and the wheels are made of wear-resistant, heat-resistant, and corrosion-resistant materials. Push and pull smoothly without scratching the door panel. Perfect for cabinet, wardrobe, or barn doors. 【Flat bottom design】The bottom is flush with the floor, and the bottom groove design allows the mounting nuts to fit perfectly. The nuts will not protrude and cause an uneven floor, ensuring that the door does not require slots and will not damage your beautiful floor. 【Quiet and anti-scratch】The sliding door guides feature a high-quality bearing system designed to operate smoothly and quietly. The wheels rotate smoothly and therefore make no noise. Sticking the included protective strips on the casters not only prevents the door and casters from being scratched by repeated friction and extends their service life, but also more effectively reduces noise and improves user comfort. 【Quick Installation Adjustment】 The floor rails can be combined in 8 different ways, and the distance between the two rollers can be adjusted according to the thickness of the door panel to meet your needs. The bottom is flush with the floor, and the nuts will not protrude and cause an uneven floor, and no additional grooves are required. Installation is quick and easy, and once adjusted correctly, it goes smoothly. 【Wide Application】: The simple and classic appearance of the floor rails is suitable for different decoration styles, such as industrial or rustic, and you can use them in various scenarios such as apartments, bedrooms, hotels, warehouses, farmhouses, garages, etc. Suitable for all types of doors, whether cabinets, closets, barns, or bathrooms. It can easily adapt to all types of configurations.