Instruct: Classify a review as either positive or negative.
Query: highly useful, but subject to confiscation

I love this little keychain tool. In fact, I've owned 3 of them. The reason I have owned 3 of them is that they are subject to confiscation at various security checkpoints. It's hard to believe, but the short blade on the end of the key seems to run afoul of certain restrictions. That's the only reason it gets 4 stars instead of 5 stars---other purchasers should beware that if they want to keep it on their keychain, they may need to remove it when traveling or risk having it taken away.