Credit Card Knife
It's a credit card... THAT TRANSFORMS INTO A FREAKING KNIFE!!
It just takes three simple folds to transform this slick card into a super-sharp utility knife! With its elegant design, you can fit this ingenious tool right into your wallet, concealed from everyone else. When the knife is exposed, its sports a 65mm stainless steel blade. When closed, the knife features a safety lock so it won't unexpectedly open.
PS: Be sure to comply with all your local and state laws related to purchasing, carrying, and using this item.