This hardware system has the worst instructions ever. And they have the worst floor track system. They provide a floor track system that requires making a groove in the bottom of the barn doors, which is VERY hard to do with a router machine. You need to buy an expensive router and it is still very difficult. They could simply provide a different hardware that does not require any groove/slit making in the door. And if they didn't want to provide a 2 cent piece of plastic, then they should say there are alternative systems for floor tracks that does not require making a slit or groove in the bottom of the barn doors. My husband cursed the world for two days. It was very painful to install the floor track system. The top rail is fine.