| 摘要 |
Method for locating metal studs hidden from view by wall board members fastened thereto by screw-type fasteners characterized by a magnetic field of force which attracts particulate magnetic material, by first locating the screw-type fasteners which are hidden from view by spackling compound or other wall surface finishing material. The screw-type fasteners are located by depositing particulate magnetic material on the outer surface of the wall board, the particulate magnetic material being attracted to a screw-type fastener by the magnetic field of force and associating with the head of the fastener in a surrounding manner on the outside surface of the wall board.
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