... sensitive, needs no adjusting Detects ferrous, non-ferrous and stainless steel weapons, contraband or other met GARRETT THDThe THD Tactical Metal Detector ... is a rugged, compact hand-held detector with silent screening.The unit's highly-sensitive, fast-action ... a heavy-duty, ballistic-weave holster. Features• Highly sensitive, needs no adjusting• Detects ferrous, non-ferrous and ...