- High quality cast aluminum - Alloy 356. - Large "footprint" for maximum holding strength. - Fully guaranteed against breakage. - Corrosion resistant - no ugly stains. - Four sizes available (10", 12", 15", 18") for different size vessels. - Can be mounted vertically or horizontally. - Smooth finish eliminates line chaffing. - Ideal for private docks and marinas where appearance and effectiveness are important. - Powder-coating available.