All wheels equipped with 2 ball bearings-When the door is opened and closed, the bearings provide very smooth and smooth sliding. Please be aware of other bearingless barn door stops that do not function well, which may damage your door. The double rollers can be adjusted to fit thinner door panels. Completely clean the floor and upgrade the rounded corners: The countersunk screw design makes our floor rails lie flat on the floor, and there is no gap between the bracket and the floor, ensuring that your floor will not be damaged. The upgraded rounded shape avoids tripping hazards and protects children and toes from injury. Heavy-duty construction-black powder-coated finish: Our premium black powder-coated brackets are made of pure steel and are perfectly shaped to be flush with your walls and floors. The system and low-profile hardware are hidden inside the device, which means there is no gap between the bracket and the floor. Our competitors did not do this, resulting in a messy appearance, poor function, and unattractive. This is enlarged in areas of concern such as the living room Why our bearing door guides stand out? Our premium black powder-coated components can be used for proper sliding door installation. However, if you buy a cheap door guide, you will alert your dog or wake up someone every time you open the door. So, if you really need a high-quality working door guide with smooth and quiet ball bearing wheels, barn door guides are the solution you have been looking for Upgrade in 2 minutes, installation is super easy The entire system will take you less than 10 minutes to install. These instructions are easy to follow. Even if you are not very convenient, there will be no problems. All in all, this is a high-quality hardware, affordable and very easy to assemble. Product specifications: 2.55 inches * 4.8 inches * 1.57 inches