Pros: Difficult to accidentally remove attached key when less than two keys are attached. Adding keys is easy unless you already have multiple keys attached. Cons: The part that locks the key ring (the flat part) is larger than the holes of all keys I use. Because of this, you need to specifically place rings on specific sides of the hole for more than a few to fit. The ring itself needs another half inch in diameter to be useful, and the flat part is mostly a nuisance, except without it you can't move the lock properly. Ultimately, it's a lot worse than a regular keychain and not worth the price it could be offered for even if it were free. I regret buying this item and advise against buying it.
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