Has anyone ever noticed that the screwdriver can be used as an ID tool? Usually the quarter can be ID'd because of it's heft and size-the dime wants to keep moving around and is harder to get a point on it-pieces of aluminum sound "tinny" and kind of make a scraping sound-sometimes you can actually feel the end cut through pieces of foil-and the point will sometimes stick in a thin piece of scrap metal-? Anybody got any more sounds or experiences?