The invention is a magnetic coupling device that utilizes a supported spherical magnet to attach to a hole in a ferromagnetic object. Later, the first random number is received from a requester and a provider identifier, the received other information and provider authentication policy requirements are transmitted to the requester. In the alternative, or in addition, the account may be managed to convert the remaining balance to a non-monetary coupon for use in an online computer game or the like, after the trigger date. The second electrode has a metal electrode layer having a thickness of 10 nm to 200 nm, and the metal electrode layer comprises a metal part and plural openings penetrating through the layer. This process for incorporating the leaching of saprolite in the high pressure leaching process for limonite ores requires neither high temperature and pressure, nor special treatment of the saprolite ore fraction, nor the addition of special reagents, e.