Here's why:
* Strong enough: Ferrite magnets offer enough strength to hold up a picture on a refrigerator, but not so strong that they're difficult to remove.
* Cost-effective: Ferrite magnets are relatively inexpensive to produce, making them a good choice for mass-produced items like picture magnets.
* Durable: They can withstand the everyday wear and tear of being attached and detached from a refrigerator.
While other types of magnets like neodymium magnets are stronger, they're also more expensive and can be brittle. They're typically not used for picture magnets because their strength can make them difficult to remove and potentially damage the refrigerator surface.
