The Prime-Line K 55518 Spring-Loaded Hinges are designed for durability, convenience, and versatility, making them the perfect upgrade for your doors. Constructed from high-quality steel,these heavy-duty hinges provide long-lasting strength and stability. Featuring a powerful spring mechanism, they enable automatic self-closing, ensuring doors shut securely without the need for manual effort-enhancing both safety and convenience. Suitable for a wide range of applications, these hinges are ideal for interior, exterior, storm and screen doors, especially in high-traffic areas. Installation is hassle-free, as each factory-sealed package includes all necessary fasteners for mounting on wooden doors. Before purchasing, please check the line art drawing for precise dimensions to ensure a perfect fit. Upgrade your space with Prime-Line K 55518 for reliable performance and smooth door operation.