Lewmar Anchor Safety Strap -11in. It is simply clipped on the chain shackle or Anchor. They do not secure (hold tight) the Anchor in the bow roller.Lewmar recommends securing the anchor to the boat when not in use. The windlass is not designed to hold the anchor to the boat when not in use. Package Contents: Lewmar Anchor Safety Strap Lewmar SS180003: Anchor Safety Strap -11in