For faster recognition of bundles of keys, you can print this thing (made for Abloy brand locks), and place it as seen in the image.

It also comes with the color coded clips for the keys. Usually, the keys come in 3 pieces. You can add or subtract the number of units for the keys as needed.

I suggest 100% infill, as the thing is so thin.

Enjoy!

PRINTED WITH:
Creality Ender 3 Pro 3D Printer
PLA filament roll