Garrett Hand Held DetectorGarrett THD Hand Held Detector The THD is the most rugged, compact metal detector on the market. With a highly sensitive 360 detection area and a silent vibrating alarm indicator, the THD is the perfect metal detector for all law enforcement operations. It is also particularly effective for use in schools, bars and clubs, and for corporate security. Features: Ultra sensitive response to metal objects. Accurate detection of all ferrous, non ferrous and