The Carbon Fiber Credit Card Karambit is a great self-defense tool that is simple to use and access. The CCK is made from thin checkered black carbon fiber. It is ultra-light and thin and has a very sharp point and chisel ground blade edge. Carry options are limited only by your imagination, there's the wallet option, or use the supplied Kydex sheath and static cord to pin or tie onto anything, allowing you to get a defensive cut as you deploy the knife.
Specifications:
Size: 3.25" x 2.1"
Blade Length: 1.6"
Weight: 0.2 oz. (0.6 oz. w/sheath)