The Compact Magnetic Stud Finder detects metal studs and fasteners within wooden studs, using powerful Rare-Earth magnet for accurate stud location. This 2-Pack is perfect to use as reference points by placing both on the walls while working. Felt pads safeguard walls. Features such as the center top notch, bottom opening, and bubble vial offer precise marking and alignment. Compact design fits in pockets and overmolded housing for comfortable grip. Drop protection up to 9.9-Foot (3 m).