Stud finder

Common card · No. 401226

A stud finder (also stud detector or stud sensor) is a handheld device used to locate wood or metal framing studs behind walls. In the United States, walls are typically made of drywall (also called sheetrock), though stud finders can also be used on lath and plaster walls, and in some cases, even tile. Stud finders generally fall into two main categories: magnetic and electronic. Magnetic stud finders detect the metal fasteners (such as nails or screws) used to secure wallboard to studs, while electronic models use sensors to detect changes in wall density. Some advanced models incorporate radar or imaging technology for more precise detection.

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