A stud finder is a device that locates the timber hidden inside a wall. Run a stud finder over it.
It matters because a heavy shelf fixed to plasterboard alone will come off the wall. A stud finder also warns of cables, which is the more important of its two jobs.
1nounstud finderA device that locates the timber hidden inside a wall.
“The stud finder beeped in three places and none of them were studs.”
stud finder is a device.
Practised in Tools & DIY