The Non-metal detector is a bold item, and it can be used to detect any non-metallic substances. To use one, all the hero must do is tightly hold the item in their hands and close their eyes. Upon reopening their eyes, the hero will suddenly be able to detect all types of non-metal items within their range of view.
Some non-metal detectors come with a handy attachment which beeps incessantly whenever the device comes within close range of a nonmetal object. However, due to this situation being incredibly frequent, most of them do not have this function, and it is very rarely used.