This is my magnetic and “modular” cat key rack/key holder.
I used 3M double sided tape for mounting (use more as I did in my test picture) and a 12mm neodymium magnet with a holding force of approx. 2kg.
Cat size is approx. 97x85x4,3mm
Circular cutout for magnet is 21 x 3,2mm
Use 5 bottom layers for an even color.
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