This was designed to give to rigid prints on my keys some space to move, as they were interfering with one other.

A very simple design, but it's fun to play with!

In terms of strength, I've pulled very hard on the rings and they began to deform with only a little stretching from the ninjaflex.

I've been carrying this around in my pocket with my keys for over a month, and there is no sign of wear at all, so I'm confident that this print would last many years of daily use.

The rings I used for this have an inner diameter of ~21mm and an outer diameter of ~24.5mm.

If anyone would like this changed for rings of a different size, it should be trivial for me to edit and upload that too, just leave a comment below.

If you like this model, please consider checking out my related designs:

• Quick Release Keyring
• Multi-Compartment Key-Holder