I've seen some of those keychains -- those are the guys who need to back-up their suspenders with a 2" belt just to keep their pants up
I have a similar set-up using a
A&P Key Ring from County Comm, but I keep it secured inside my EDC backpack and I hesitate to call it a keyring since there are no keys on it.
That said, if you are inclined to keep a keychain like that, the 4Sevens Mini 123 would be a great addition.