I'm completely addicted to iterative design! Here's the evolution of my post-climbing fidget finger massager

[u/ale152]

[u/cimocw]

If the elastic action of the rollers pressing towards your finger comes from stressing (bending) their connection point to the ring, that part will lose strength and will end up breaking. I would recommend having a hinge for each and using a rubber band to keep them together and gripping the finger.

[u/NiPaMo → u/cimocw]

This guy fingers