Metal detectors are electronic devices that are used to detect the presence of metal objects. They work by generating a magnetic field and then measuring any disturbances in that field caused by nearby metal objects. Metal detectors are commonly used in a variety of settings, such as airports, schools, and public events, to ensure the safety and security of individuals. They are able to detect a wide range of metal objects, including weapons, jewelry, and even small pieces of metal. Metal detectors are an important tool in maintaining security and preventing the unauthorized entry of dangerous items into restricted areas.