HHMD stands for Hand-Held Metal Detector. It's a portable device used for detecting metal objects on a person's body or in their belongings. HHMDs are commonly used in security screening applications, such as at airports, schools, prisons, and events, to enhance security by quickly and efficiently identifying potentially prohibited items such as weapons or metal objects. These detectors are operated manually by security personnel who scan individuals or objects with the device to detect any metal present. HHMDs are lightweight, easy to use, and offer a non-invasive method of metal detection, making them an essential tool in ensuring public safety and security.