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.
