Adjustable Function: Fully adjustable rollers ensure smooth and safe gliding. The bearings provide a very quiet and smooth glide when the door opens and closes. Adjustable double rollers to fit a thinner panel. Convenient Function: The sliding door guide can be used with 3-inch thick doors, suitable for all brands of barn door. Countersunk screw design so that our floor guide rests on the floor, with no gaps between the support and the floor, ensuring no damage to the floor. Easy to Install: This floor guide is easy to install. Simply attach 2 screws to the bottom plate, adjust and tighten. Our floor guide is made of carbon steel and perfectly shaped to provide a flush fit with the wall and floor. Convenient to use: The integrated door guide bearing allows for an ultra-smooth, easy-to-use roll.