Spring hinges are specialized hinges that incorporate a spring mechanism, allowing doors or lids to automatically close after being opened. They are commonly used in applications like doors, cabinets, and gates, providing convenience and ensuring that the door returns to a closed position without manual effort. These hinges come in various sizes and materials, making them suitable for both residential and commercial use. The tension of the spring can often be adjusted, allowing users to customize the closing speed and force. This feature enhances safety and energy efficiency by preventing doors from remaining ajar.