Useful tool for locating wall studs easily
Base of stud finder is grooved for marking once studs are located
Stud Finder Type: Magnetic; Width: 1 3/8; Depth: 1 3/8; Height: 1 1/4".

Detects studs up to 1 1/2 inches below surface material
This ergonomically designed wood and metal stud finder with AC detection indicates what it is sensing below the surface with sequential LEDs and audible beeps
Stud Finder Type: Internal Capacitor-Edge; Power Source(s): 9V Battery (sold separately); Width: 6; Depth: 10".