If you’ve ever looked closely at a car’s seat belt, you may have noticed a tiny plastic button attached to the belt near the buckle. It is easy to overlook, but this small component has a simple and useful purpose. Commonly called a stop button, retaining button, or seat-belt stop, it helps keep the buckle in a convenient position when the belt isn’t being worn.
The button is usually located on the webbing just below the buckle. Its primary function is to prevent the buckle from sliding too far down
