To verify whether the stud you located in Stud Scan or DeepScan® mode is metal or wood, you would need a MultiScanner™ stud finder with Metal Scan mode (or a dedicated metal finder). Switch the mode to Metal Scan and scan the stud again. If you receive positive metal indications from floor to ceiling, the stud you located is metal. Intermittent metal indications from floor to ceiling are likely nails or screws. (This mode will only detect the presence of metal.)