The small button on a car seat belt, called a stop button or retainer button, plays a key role in both convenience and safety. It prevents the metal latch plate from sliding too far down the strap when not in use, making it easier to grab when fastening your seat belt. Most seat belts have,
two stop buttons: one near the latch plate to stop it from sliding down and another near the top to prevent it from moving upward. If these buttons break, they can be easily replaced with tools from auto parts stores.
