Mountain style key holder for YYVertical keyring stoppers

I'm a big fan of the YYVertical Keyring Holder (https://www.yyvertical.com/en/collections/key-holders) but needed a second keyring holder for five keys. So I was inspired by the original and designed my own. 

The cracks in the mountain are designed so that the original YYVertical Keyring Stoppers fit perfectly and don't slip out. I printed my prototype using marbled PLA and then glued it to a wooden board with superglue. This combination has held up well so far, is used daily, and is even used by children. 

I would recommend a wall thickness of at least 1.2 mm for printing.

Edited on October 23, 2025: For those who have the keychains from YYVertical, I've made a 3D printable version. (https://www.printables.com/model/1454759-keyring-climbing-stopper-nut)