Cryptex for geocaching

Update 29/01/2022:
The inner cylinder was improved to fix the lock rotation when closed
4 and 6 letters cryptex now directly available as STL files
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French version:
https://www.thingiverse.com/thing:4903005

Each part is available in independant STL file.

This cryptex model is currently for 5 letters. To increase or decrease the number of letters, you can add or remove a 15.2mm slice to the inner and outer cylinders.

To block the lock, you can insert 2 short lenght of 1.75mm filament inside the small holes.

The best filament color is white (or very light colors) to color the external rings and to bring out the letters.