Patent ID: 8671725

Claim:
A key assembly comprising: a key blade, the key blade being substantially flat and having a first surface and a second surface, the key blade configured to be inserted into a mating lock; an aperture in the key blade, the aperture having an axis and a shelf radially disposed within the aperture; a cap having an outer surface, captured in the aperture for continuous axial travel between a first limit extending out of the first surface and a second limit recessed within the aperture; and a base having an outer surface, captured in the aperture for continuous axial travel between a first limit extending out of the second surface and a second limit recessed within the aperture, wherein the cap includes at least one lower protrusion having at least one tab and the base having at least one lip, the at least one tab configured to engage the at least one lip to limit the distance the cap and the base may be biased away from each other and wherein the lip and the tab define a circumferential channel configured to engage the shelf in the key blade aperture; and a magnet associated with the base, the cap or both, the magnet having sufficient magnetic strength to attract or repel a movable part of the key, or the lock from a locking position to an unlocking position in the lock, or in both the key and the lock.