Signet finger rings fitted with a magnet (aka Link Rings) have been a very useful gimmick for magicians over several decades. The PK Ring lifts this useful gimmick into the miracle class.
It is a very strong Neodymium magnet in the form of an ordinary Wedding Ring. Since the entire ring is magnetized, you do not need to turn the ring on your finger to bring the magnet towards the palm as with previous magnetic rings.