The nut is not the same magnetic, but it has a ring/pin magnet which is normally glued inside with black hard glue. The product arrived with the magnet detached. It seems that it was once glued because there is a perfect imprint of the magnet in the glue. I was able to push the magnet back into place by pushing it with a cylindrical object of the same diameter as the magnet. At the moment, the magnet is so tightly in place that not only do I assume it will do its job without any problem, but I wonder how it was possible for it to come out of place in the first place (maybe the glue softens with heat). I will come back after using it.
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There was a change in 4 spark plugs. The nut worked perfectly. The spark plugs sit completely parallel to the nut without any play. They are held in place adequately by the magnet.