I got one of these in the Mystery boxes. It is stunningly average to unuseful. Oh it is a knife, and it "may" roughly fold to the dimensons of a credit card...except in thickness. It is small and cramped for my average sized hand, uncomfortable to use to cut anything that give resistance to it. Except for opening up boxes (for which a razor blade knife works better) or opening up your mail with a knife, I don't see much use for it. If you want a carry knife that is of small dimensions, I guess it ticks that box, but if you want a carry knife you can practically use, look elsewhere as this isn't it.