Magnets Red Stud Finder is a red, magnetic stud finder with a red shield. It uses super strong neodymium magnets to locate nails in studs. Neodymium is one of the strongest rare-earth magnets commercially available. It can be used as a nail starter and for a plumb line, clamshell package with barcode. Magnets are extremely durable and useful in carrying out many functions. They can be used extensively without worrying about losing their magnetic properties. Their quality is high grade and their magnetic forces are relatively stronger