Using these pool hinges is easy. First, make sure the glass and the wall surfaces are clean and flat. Then, attach the hinges to the glass and the wall according to the included instructions. As for the self - closing function, it will work automatically once the hinges are properly installed. When using these hinges, always remember that they come in pairs, so buy the right quantity for your project. To keep your hinges in good condition, clean them regularly with a mild soap and water solution. Avoid using abrasive cleaners as they can scratch the finish. If you notice any looseness or damage, tighten the screws or replace the hinges as needed.