This allows me to remove my car key from my keychain when I go to the gym. I have a Honda with a fairly large key and it was impossible to insert the key into the carabiner. I used a small key ring on my car key and then attached a carabiner to it. The carabiner is well made and small, so it has a certain thickness. I would prefer to use it without the extra key ring, but the carabiner should either be thinner and probably less durable, or larger.
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