[Upgrade Floor Guide] Adjustable floor guide is made of corrosion-resistant carbon steel, black powder coated, makes it durable, frosted appearance is more beautiful. The total weight of the floor guide is 0.33 pounds, it is suitable for 2cm-5.4cm thick door. [Unique Design] Adjustable zigzag design, firm, light and concealed fixing, suitable for indoors and outdoors, and can be perfectly matched with different styles of barn doors. [Smooth Sliding] The rotating wheel perpendicular to the side not only makes the sliding smoother and quieter, but also save more space. Flush bottom design will not damage your beautiful floor. [Easy to Install] It is not necessary to book grooves on the door, or drill holes on the floor. You can adjust the position of the roller according to your door panel as you like. [Seller Warranty] We provide 5 years warranty and 30 days unreasonable return. If any parts you receive are missing or have any problems during use, please feel free to contact us and we will solve the problem for you within 24 hours.