MagSafe magnets are used in the iPhone 12, 13 models, their cases and chargers. They are a set of compatible magnetic components. They make wireless charging easy and efficient with magnetic positioning and connection.
Besides Apple supplied MagSafe magnet accessories, other third-party companies can also supply MagSafe magnet products. If iPhone users use other non-Apple accessories without built-in magnets, they can buy MagSafe magnets to attach to their cases and chargers instead.
MagSafe magnet material is NdFeB. Apple recommends N45SH, N48H grades.