For our evaluations, we built a four-by-eight-foot wall from common materials: wood and metal studs; drywall; copper, black, pex, and PVC pipes; and nonmetallic sheathed cable. Then, we scanned ...

While the magnet won’t help detecting the wood stud itself, it will help you locate the metal screws used to attach the drywall to the studs. You can’t just use any ordinary magnet off the ...