A tool, system, and method are disclosed for locating a hidden stud and identifying angles on a finished wall. The tool includes an elongated housing, at least one magnet, and at least one level. The housing has a generally planar contact surface disposed opposite a viewing surface. The at least one magnet is secured to the housing such that a magnetic field from the at least one magnet extends from the contact surface. The level is secured to the housing such that the level is viewable from the viewing surface. The at least one magnet, the level, and the housing are sized relative to each other such that a magnetic attraction between the at least one magnet and a metallic element in the wall is sufficient to maintain the tool on the wall without external support.