National Hardware's Heavy Duty auto-close gate hinges are designed for a variety of outdoor applications, including wood, steel, or vinyl. Black plated steel finish for style and durability. Installs with included mounting hardware in both left and right handed applications. Includes 2 heavy-duty gate hinges, hinge tension adjustment tool, and matching mounting hardware. Coated with WeatherGuard Protection to withstand harsh weather conditions and prevent corrosion. The strong, fully enclosed adjustable spring closes gates or doors automatically. National Hardware's Lifespan Limited Lifetime Warranty.