WeatherGuard protection offers three times the corrosion resistance of competitors, with a formulation designed to endure the harshest weather conditions and resist the effects of pressure-treated lumber. Extensive testing and real-world use have demonstrated that WeatherGuard surpasses standard zinc-plated products in durability. The National Hardware 4-7/8 inch L screw hook, with a 150 lb capacity, comes in a single pack, ensuring long-lasting performance.