Patent ID: 7802371

Claim:
A level comprising: an elongated body defined by a first and a second pair of spaced walls, the first pair of walls extending parallel to a reference plane and the second pair of walls generally normal to the first pair of walls, and wherein an opening is defined in at least one of the walls of the second pair of walls; an internal cavity defined by the elongated body; an orientation indicating device carried within the internal cavity and aligned with the opening; an elongated groove extending along the length of one of the walls of the first pair of walls, wherein the elongated groove extends inwardly toward the internal cavity such that a pair of slots spaced from one another are defined against an interior surface of the wall of the first pair of walls; and a magnet arrangement positioned in the pair of slots such that the magnet arrangement is spaced from the reference plane adjacent the magnet arrangement by the wall of the first pair of walls.