Gen3 Marine Vinyl Coated Mushroom Anchor This Gen3 Marine Mushroom Anchor is perfect for boaters due its compact design and ease of use. Gen3 mushroom anchors are constructed of cast iron and are coated with a heavy-duty, long-lasting vinyl. The coating not only protects the anchor from corrosion but also protects the finish of your boat as well. When not in use, the compact size of these anchors makes them easy to stow. This mushroom boat anchor provides excellent holding power in soft bottoms