I don't keep much on a keychain. Only 1 key and a key fob for my car. I saw this magnetic connector and liked the idea, but was worried the magnet wouldn't be strong enough. I'm glad I gave it a chance because from personal experience the magnet is more than strong enough. .I really can't imagine it could be accidentally undone. HOWEVER I ordered 3 packs and one of them had the case cracked meaning the case wasn't strong enough to hold the magnet. I returned quickly but the other 2 gave me enough confidence that it will be more than in the past!