Locate drywall screws and nails in studs, and use as a nail starter and for a plumb line. Ideal for the do-it-yourselfer or home improvement customer who needs to hang pictures, shelves or decorations, or anchor items to a stud. Easy to use, has no mechanical parts, and requires no batteries or calibration. The Stud Magnet™ has a Magnetic Shield™ which blocks the magnetism when it is not in use. It allows the Stud Magnet™ to be stored neatly in any toolbox by preventing it from attracting to other tools or nails.