Credit Card Knife, anyone ever used one?

[Korin_Mari]

Weird but pretty cool. I wonder if you you can actually sharpen them.

[Notaskinnychef]

Well i gave in and bought one, 18 bucks shipped, i will let people know how it is once i get it. For some reason I find myself coming back to that knife so i decided to buy it instead of other slightly larger wallet sized accessories.