A grappling hook that folds down for easy storage. Put it in your ninja backpack! Holds over pounds and has 33 feet of nylon rope to help you scale most 3 story buildings.
Used in the hit movie, "Who Dat Ninja" with Tracy Jordan.
Simple, cheap and effective self defense. Insert into your shoelaces and potentially add a life-saving tool that will give you enough time to get away and get help.