Glenn Wiseman, RASDT, RHDT, and Sales Manager at Top Hat Home Comfort Services, explains, "A stud finder is the most important tool in your kit for wall studs. Put simply, a stud finder basically works like a metal detector, except instead of finding buried treasure, it locates the wood framing behind your walls. Stud finders work by sending out an electronic signal that bounces off of the drywall, hitting any solid object along the way. The signal then returns to the device, which uses that information to make a beeping noise or display an LED light on its screen. There are a myriad of different stud finders to choose from, but they all work similarly."