Definition & Meaning of "stud finder"

What is a "stud finder"?

A stud finder is a tool used to locate wooden or metal studs behind walls. It helps identify the solid framing in a wall, making it easier to securely hang heavy objects like shelves, mirrors, or TVs. Stud finders work by detecting differences in density, magnetic fields, or electrical signals within the wall. They often have visual or audio indicators to show where a stud is located. This tool is commonly used in construction, carpentry, or home improvement projects to ensure proper fastening and prevent wall damage.