Sea Dog Anchor Chock for Danforth style anchor. Anchor Chocks help protect the surface of your deck in rough seas or while the boat is underway. Secures the anchor when not in use while still maintaining easy access. For use with conventional fluke anchors from 5-20 lbs., 9/16" maximum shank thickness. Constructed of corrosion resistant investment cast 316 stainless steel. Deck mounts with ten #10 FH fasteners (not included).