Handheld metal detectors are portable devices used to identify the presence of metal objects. They are commonly used in security settings, such as airports and events, to screen individuals for weapons or prohibited items. These detectors work by emitting electromagnetic fields that react to metal, alerting the user with sounds or lights. In addition to security applications, handheld metal detectors are also popular among treasure hunters and archaeologists. They help locate buried items like coins, jewelry, or historical artifacts. The ease of use and portability make them valuable tools for both professionals and hobbyists in various fields.