Was originally going to make a thread but some of the photos were poor. The magnets look like old school very large hard drive magnets:
BTW major flaw with this stand, if you use the brass sponge to clean off the tip, that area is not a sealed compartment. So, after a few months of soldering and you pick up the base, solder falls everywhere...
Its a simple fix, but considering how well the rest of the stand is designed I'm surprised they missed it.
Silicone added: