The Kreg Magnetic Stud Finder uses powerful neodymium magnets to reliably locate hidden screws or nails in wood and metal studs. An integrated laser marking line shows you the exact center, while the spirit level helps ensure absolute straightness. The device remains ready for use even without batteries, and plug-in batteries provide additional features. Its robust plastic housing and compact size make it ideal for marking drill points or fasteners quickly, precisely, and hands-free.