The base is split, separated by a non magnetic substance. The magnet is
rotated by the switch. When the individual poles line up with individual
halves of the body, the base sticks. When the magnet is rotated so both
poles line up with the same half, the magnetism, for the most part, is
contained within the body.

"Ogee" wrote in message
...
Prometheus wrote:
On Fri, 17 Nov 2006 18:50:00 +0100, Ogee wrote:

Yes. it would probably do the job, but what's nice about the other
product is the ability to switch the magnets on/off.
Anybody know how that's done?