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. $25.00 Eye bolts are used for harnesses http://www.bioguiden.se/redirect.aspx?url=https://www.ledteks.com/seatbelt-and-safety-belt-webbing