The Palm is a bungee and ring system that prevents the mainsheet from tangling with the engine or from hanging up on the aft corner of the transom or rudder.  The kit includes the stainless ring, the bungee, an eye strap, a Harken micro single block, and fasteners. The Palm is not class legal for racing. It does not include the mainsheet extender or Ronstan bow shackle. They are linked below. Another option that is class legal is the Mainsheet (shorck cord) Retractor kit. It is linked below.