A hasp is a type of fastening device commonly used to secure doors, gates, and storage boxes. It typically consists of a metal strap that is hinged on one side and a loop or slot on the other side where a padlock can be inserted. This design allows for easy locking and unlocking while providing a reliable way to keep items safe. Hasps come in various sizes and materials, including steel, brass, and plastic, making them suitable for different applications. They are often used in conjunction with padlocks to enhance security, making them popular in both residential and commercial settings.