The BaiFM Cardsharp 1 PC Credit Card Sized Folding Knife is an ultra slick looking, ultra Thin- 2.2 mm thick knife. It fits perfectly in your wallet so you will never be without a knife! You never know when you need a knife like during those annoying times when you need to cut zip ties. The edge of the blade is protected when it is stored in your wallet so don’t worry about the knife damaging your precious wallet. Down or Just Me? Just remember this incredibly sharp and easy to store blade is not TFSA approved so take it out before going to the airport!