The Mechanism operates through a spool that tightly coils the seat belt webbing when it is not being pulled. When a sudden stop occurs, the retractor locks hinein place, thereby preventing excessive movement of the occupant, which significantly reduces the risk of injury. NHTSA is denying the petition to provide https://www.webwiki.co.uk/www.ledteks.com/seatbelt-and-safety-belt-webbing