Features: Featuring adjustable tension control, these 2pcs nylon gate hinges allow precise spring strength customization for smooth door operate across various gate weights and closing speeds using the included tension tool. Engineered with rust resistant nylon polymer and stainless steel components, the hinges integrate optional safety cap to prevent toddler footholds while maintaining auto lubricating, weatherproof performances for outdoor durability. Ideal for households with children, pet owners, and homeowners seeking childproof solution for garden gates, fence doors, or backyard enclosures requiring stable safety features. Perfectly suited for exterior gates, garden partitions, and outdoor fence systems exposed to rain, humidity, or temperature fluctuations where erosion resistance and consistent auto closing functionality are critical. The auto closing mechanism with tension memory ensures automatic gate closure without slamming, while the reinforced hub structure withstands repeated use in residential and light commercial applications. Specifications: Component : nylon Size: about 9.6x6.4cm/4x2.5inch Package Includes: 2 x auto -Closed Door Hinges note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.