Question, if I have an unbreakable ring, what cool things could an engineer do with that?

It really depends on the other material properties. Like if it’s as slippery as nylon vs as slippery as rubber is really gonna change things. Plus how does it react to outside forces trying to destroy it? Absorption? Diffusion? Conversion (like heat into sound or something).

All that would drastically change what you could do with it

the question is, with only ONE of those rings, is there something useful to be done?