Tools, systems, and methods for locating hidden studs and identifying angles on a finished wall

A tool to locate a hidden stud within a wall, the tool comprising:

• an elongated housing having a generally planar contact surface and a viewing surface;
• at least one magnet secured to the housing such that a magnetic field associated with the at least one magnet extends outward from the contact surface;
• a first level secured to the housing such that the first level is viewable from the viewing surface, the first level configured to provide an indication when the first level is substantially horizontally oriented such that when a longitudinal edge of the housing is in a substantially horizontal orientation, the first level provides a visual indication that the longitudinal edge of the housing is in the substantially horizontal orientation;
• a second level oriented such that when the longitudinal edge of the housing is positioned in a substantially vertical orientation, the second level provides a visual indication that the longitudinal edge of the housing is in the substantially vertical orientation;
• a third level oriented such that, when the longitudinal edge of the housing is positioned at about a forty-five degree angle from the substantially horizontal orientation, the third level provides a visual indication that the longitudinal edge of the housing is positioned at the forty-five degree angle;
• and
• a fourth level oriented such that, when the longitudinal edge of the housing is positioned at about a three hundred fifteen degree angle from the substantially horizontal orientation, the fourth level provides a visual indication that the longitudinal edge of the housing is positioned at the three hundred fifteen degree angle;
• wherein the magnetic field associated with the at least one magnet is sufficiently strong to cause a magnetic attraction between the tool and a metallic element in a vertical wall to maintain the tool on the vertical wall without external support.