Most electronic stud finders work by sending out a signal from a sensor inside, then reading the signal that bounces back. In commercial construction, where metal studs are standard, you may find magnetic stud finders more useful. If the builder missed the stud, so will the magnetic stud finder. Magnetic stud finders aren’t always the most accurate, though-they rely on the fastener actually being driven into the stud. We tested several options to find the best stud finders for home and commercial use, whether you just need a hand hanging up your new shelves or you’re hoping to avoid damage while you work within the drywall. To test all the features, we put a selection of stud finders through their paces on a wall of our own making and walls in real homes. That doesn’t mean that stud finders work like X-ray vision, though-there’s a lot going on in walls, and it can be hard, despite advances in tech, for any device to determine what’s a pipe and what’s a wire, for instance. This can help make sure you don’t hit a pipe or wire when hanging something up-a mistake that can quickly become an expensive one. Some stud finders have other features, too, like deep scanning and AC wire detection. Studs-the wooden or metal beams that your drywall is attached to-are the most sturdy place to sink weight-bearing anchors into drywall to ensure your wall hangings don’t fall. Knowing where your studs are is crucial for hanging up heavy items, like mirrors or mounts for flat-screen TVs. A stud finder is good for, well, finding studs you can’t see.
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