In a world where security is paramount, handheld metal detectors emerge as indispensable tools that seamlessly blend advanced technology with the critical task of threat detection. These compact yet powerful devices are meticulously designed to identify metallic objects on individuals and in various environments, ranging from high-security zones to everyday scenarios. As we embark on a journey through the realm of handheld metal detectors, we will not only unveil the science behind their operation but also acquaint ourselves with the technical terminology that underscores their efficacy.