There is little worse than working on a project, getting everything back together, and then realizing you still have little screws leftover. Or worse, you can't find that one tiny piece you need to get everything put back together. Eliminate any issues like these entirely with a magnetic parts tray. With built-in magnets on the bottom radiating their magnetism throughout the entire tray, all you need to do is drop your metal pieces in the tray, and never worry about them again until you need them. Toss the tray under your hood when doing automobile work. Or put it on the side of your compressor. Whatever location you choose, your parts will stay with you.