This rubbercoated holding magnet is ONE POLE. Specialproduced to work with magnetsensors.
All other rubbercoated systems are with multipole. This means that they are stronger on thinner plate/steel sheet
because of more magnets in the same system.
Here are for example the difference between this article (61-0519-JT) and our standard rubbermagnet 61-0519-10 (multipole)
Stated force applies in ideal conditions, on a 10mm thick iron plate, without safety factor.
1kg ≈ 9.8N (Newton)
Note that holding magnets releases at given strength (in ideal conditions).
Always use some margin.