Adjustable Caster: It comes with an adjustable roller, which makes the door smoother. Easy to use: Fix it on the wall with the screws, no extra wood needed is necessary to make it run smoothly. It fits all door types to provide smooth operation and comes with range adjustment from 2.5cm to zero. Material: The sliding door floor guide is made of high strength steel and made of POM nylon. Premium Design: The heavy duty sliding door floor guide comes with a recessed design that 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 the floor , the 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