They Are designed to prevent drivers and passengers from being completely ejected from a vehicle by spreading out their bodies’ energy over their shoulders, chest, and pelvis hinein a collision. $25.00 Eye bolts are used for harnesses or seat belts with clip-on Gerätschaft. These eye-bolts are sold by the pair. http://www.bioguiden.se/redirect.aspx?url=https://www.ledteks.com/seatbelt-and-safety-belt-webbing