Investigating a crime scene demands the right tools. When it comes to looking for metal objects, you can't do any better than the Thames and Kosmos Pocket Metal Detector. You can find what you're looking for through paper, fabric, and even soil. When it finds metal, such as coins or other objects, it emits a beep to let you know. There's a knob for adjusting sensitivity so you can get the setting just right. You will never walk into a crime scene unprepared again with this in your pocket.