And that's how you do it:
- Think about how many magnets you want to embed in the rack and mark the locations for the holes.
- Carefully drill the holes with the hole cutter and make sure you don't drill through the rack.
- Place the magnets (right orientation) in the holes and fill them with modeling clay.
- Hang up the rack and attach the metal containers. You can glue magnets into non-ferromagnetic containers.