Perfect size to replace those traditional circular key ring loops but making it easy to quickly remove keys with the twist of a lever.
I have a utility keyring with a range of different tools; mini Swiss Army knife, laser pointer, fire peanut, money stash, nail clippers.... Using these little carabiners makes it easy to isolate the tool I need from the rest of the bunch,
Although the locking levers are plastic, they're small and sturdy enough not to break off with ease. That was my main concern with these but I'm satisfied with them. Just don't forget to lock them once you've done!