I have a similar one that has reached a respectable 24 years. The issue is that I have lost almost all of its links, so I got this one. Time will now tell if this turns out well... Regardless, it is an extremely practical keychain.

I had a similar one from 25 years ago that was still circulating without a brand but only with the patent number - that's how I was able to find it again and buy it again because I was left with two rings. Immortal and very elegant keychain, if it can be considered a keychain. It comfortably holds 8-10 keys (not intended for a keychain). The whole thing doesn't take up space since the keys with their rings move freely inside the recess and are not attached to a large ring. That's why it is particularly user-friendly.