Adjustable Caster: It comes with an adjustable roller, which makes the door smoother.< /p> Easy to use: Fix it on the wall with the screws, no additional wood is needed to make it work smoothly. It fits all door types to provide smooth operation and comes with adjustable range from 1 inch to zero. [Material]The sliding door floor guide is made of high-strength steel and POM nylon. Premium design: the heavy duty sliding door floor guide comes with a recessed design which gives it an excellent finish. And the door does not need grooves, which avoids damage to your door. [Ideal solution]This sliding door floor guide is the best solution for home and is used with floor, door panel, and comes with an adjustable roller as well as 2 floor guides and 4 sets of screws for easy installation. Product Description Features: 1. Improves the appearance of the floor guide and protects screws or bolts and increases their structural life. Additionally, it can prevent scratching the door from exposing hard edges. 2. 8 in 1 Installation Optional assembly methods, this means that no matter the size of your door, it will almost certainly fit. 3. Coated with black powder surface, ensures corrosion protection and long service life. Sturdy, durable construction with flush bottom to ensure the floor guide sits on the floor without scratching the floor.