[Durable & Sturdy]: This heavy duty barn door stopper can tightly hold on the track easily, barn door rail stopper only fit for 1-9/16"(4cm) wide and 1/4"(6mm) thickness track, and only fit for less than 3-15/16"(10cm) in diameter of roller wheel. Note: T-roller and Y-roller cannot use this barn door stopper. [Easy Installation]: You can hang barn door stopper across the track easily even though a finished project, we have this spring barn door stopper for track install video, please check. Note:Only 1.57"/40mm wide and 0.24"/6mm thickness track can use L-wrench to tighten or losen small screw to fix or removable the barn door stopper. [Easy to Use]: You can slide barn door stops across the rails easily and stop wherever you need it to (NOTE: This barn door stop is for single door, not double doors); [Spring Damping Design]: CCJH barn door stopper for top track - Unique spring design makes no sounds when opening and closing doors and minimize the impact between the track and the wall; [Professional Service Team]: When using barn door stop, please feel free let us know if you get any problem during installation and use, we will help you solve the problem immediately. Advantage:

--This door stoppers is constructed with heavy duty steel and the surface which touch with the roller arms is made by pure nylon，so it brings no sound when door stoppers bump with the roller arms.
--This door stoppers is installed over the rail which is prevent the rollers fall off from sliding track. And it is easy to install by yourself.

How to install the door stop?

The door stopper can be slipped in before or after installation. They can be adjusted too. But these are need to slip in at the ends because they have groves that wrap around the rail so it does not fall off, If your rails fit from one wall to the other, you have to install the door stopper before installation.