Ralph Mowery presented the following explanation :
In article , says...

On 4/21/2020 7:36 PM, Andy wrote:
I bought some 1.5 inch Neodymium Disc Magnets.

I used some for holding tools.

I am looking for other ideas for what to use them for.

I was incredulous for the holding power of them.

After removing the separators between two of them, I had a heck of a time
separating them.

Andy


I have 3 about 2x3x 1/2" stuck together. I am going to have to make a
special tool to get them apart. I have to be REALLY careful around any
iron of any size not to get pinched.



The computer hard drives have some very powerful magnets in them.

Microwave ovens too.