National Hardware 3/8" x 4-1/2" Heavy-Duty Screw Hook features a lag screw thread design, crafted from durable steel with a zinc finish for enhanced strength and longevity. This screw hook is treated with WeatherGuard protection, specifically formulated to endure the harshest weather conditions and resist the corrosive effects of pressure-treated lumber. I for heavy-duty applications, it combines reliability with robust construction to ensure long-lasting performance in outdoor environments. Model Number: N220-830