The strap consists of a double hook: one end connects to the anchor point of the vehicle and the other hook connects to the lower tether strap of the baby capsule This upper anchorage strap is perfect for those who have misplaced their original tether strap, or who would like another tether strap for a second vehicle The strap features an adjustment mechanism for loosening and tightening the strap. It comes with its own handy bag for easy store-away of any excess strapping, to keep the strap neat and contained in your vehicle