Pyramid anchors provide excellent holding power and work in tidal waters and rocky or sandy bottoms. They are superior to concrete blocks because the anchor rapidly sets itself by presenting a digging edge to penetrate the bottom. The pyramid shape presents a large surface area which creates high suction that increases the deeper it sets. The short shank allows mooring in shallower waters without chain wrap-up, a characteristic of mushroom anchors. Painted cast iron. Not available in all locations.