Instruct: Classify a review into positive or negative sentiment.
Query: Best Key-Chain Knife - Period

This is not the sharpest knife in the world. Nor the easier to open. But its size is absolutely perfect for a key chain, and it always gets the job done. It's hard to find a quality knife this size. I love CRKT's products - I don't think I've ever been terribly disappointed by them.Buy one to keep with your car keys, and you'll always have a discreet, useful blade with you when you need it.