A leveling device configured to measure levelness of a workpiece, the level comprising: a level body having a planar base surface and defining a longitudinal axis; at least one level vial located within the level body; and a magnetic coupling element supported by the level body such that a magnetic field generated by the magnetic coupling element extends outward from the base surface, the magnetic coupling element having a north-south axis; a cavity formed in the level body and extending inward from the planar base surface; a groove formed in the base surface and extending in a longitudinal direction along an entire longitudinal length of the base surface, wherein the cavity is located in the groove; wherein the magnetic coupling element is positioned relative to the level body such that the north-south axis is positioned substantially parallel to the planar base surface and substantially perpendicular the longitudinal axis; wherein the magnetic coupling element further comprises: a permanent magnet defining the north-south axis; and a pair of separate metallic structures (40, 42) located on opposing lateral sides of the permanent magnet such that the north-south axis intersects both of the metallic structures (40, 42), wherein the separate metallic structures (40, 42) are formed from a ferromagnetic material; wherein the level body is formed from a metal material different from the ferromagnetic material of the metallic structures (40, 42); wherein the permanent magnet and the pair of separate metallic structures (40, 42) of the magnetic coupling element are coupled to the level body within the cavity; wherein the magnetic coupling element is uncovered such that an outer surface of the magnetic coupling element defines a portion of an exterior surface of the level at the location of the cavity; wherein each of the metallic structures (40, 42) includes an angled outer surface defining a plane located at an angle relative to the base surface between 10 degrees and 80 degrees, preferably between 20 degrees and 60 degrees, the angled outer surface facing in a direction away from the base surface and away from the permanent magnet. a level body having a planar base surface and defining a longitudinal axis; at least one level vial located within the level body; and a magnetic coupling element supported by the level body such that a magnetic field generated by the magnetic coupling element extends outward from the base surface, the magnetic coupling element having a north-south axis; a cavity formed in the level body and extending inward from the planar base surface; a groove formed in the base surface and extending in a longitudinal direction along an entire longitudinal length of the base surface, wherein the cavity is located in the groove; wherein the magnetic coupling element is positioned relative to the level body such that the north-south axis is positioned substantially parallel to the planar base surface and substantially perpendicular the longitudinal axis; wherein the magnetic coupling element further comprises: a permanent magnet defining the north-south axis; and a pair of separate metallic structures (40, 42) located on opposing lateral sides of the permanent magnet such that the north-south axis intersects both of the metallic structures (40, 42), wherein the separate metallic structures (40, 42) are formed from a ferromagnetic material; wherein the level body is formed from a metal material different from the ferromagnetic material of the metallic structures (40, 42); wherein the permanent magnet and the pair of separate metallic structures (40, 42) of the magnetic coupling element are coupled to the level body within the cavity; wherein the magnetic coupling element is uncovered such that an outer surface of the magnetic coupling element defines a portion of an exterior surface of the level at the location of the cavity; wherein each of the metallic structures (40, 42) includes an angled outer surface defining a plane located at an angle relative to the base surface between 10 degrees and 80 degrees, preferably between 20 degrees and 60 degrees, the angled outer surface facing in a direction away from the base surface and away from the permanent magnet. a permanent magnet defining the north-south axis; and a pair of separate metallic structures (40, 42) located on opposing lateral sides of the permanent magnet such that the north-south axis intersects both of the metallic structures (40, 42), wherein the separate metallic structures (40, 42) are formed from a ferromagnetic material; wherein the level body is formed from a metal material different from the ferromagnetic material of the metallic structures (40, 42); wherein the permanent magnet and the pair of separate metallic structures (40, 42) of the magnetic coupling element are coupled to the level body within the cavity; wherein the magnetic coupling element is uncovered such that an outer surface of the magnetic coupling element defines a portion of an exterior surface of the level at the location of the cavity; wherein each of the metallic structures (40, 42) includes an angled outer surface defining a plane located at an angle relative to the base surface between 10 degrees and 80 degrees, preferably between 20 degrees and 60 degrees, the angled outer surface facing in a direction away from the base surface and away from the permanent magnet.