2 piece bow/stern tie-down, sold individually. Two are needed to properly transport your kayak.
One piece consists of an 8' length of 1" webbing with a single loop at one end. The other piece is a 1' length of webbing with a loop at one end and a cam buckle at the other.
Wrap the longer section around the hull of the boat near the bow/stern, utilizing the eye plate as a guide to keep it in place. This will maximize stability and minimize possible damage to the kayak in the event of a rack failure during transit.