The mysterious spring in a carabiner - Carabiner Teardown 

thanks! this might be the one and only place on the internet where this is explained

Amazing work! It is impressive not only that you paid attention to it but also figured out how it works.

Things you didn't notice to think about-- cool.

How difficult do you think it would be to coat a store-bought S-carabiner in a sort of rubberized finish on your own? I imagine the most difficult part would be keeping the holes completely clear of any of the rubber filling. Trying to get a rubberized s-carabiner in order to completely deaden the sound profile it has when moving and hitting against things for my personal usage.

Very helpful thank you!

What is the spring metal made out off? Can we make it out of silver for example? How to make it that robust to snap back?