Make Your iPhone Into A Weapon With the iStab
These days it seems smartphones can do just about anything, but you may have noticed your phone has a definitive lack of stabing and slicing abilities. But now, thanks to the iStab, that's all about to change.
Inventor Mike Warren found existing designs for folding knives and iPhone cases and then combined the two in a 3D design editor. Mike then used an Objet500 Connex to print the case pieces and put them together with a pairing knife blade.
Mike warns that the knife may be considered a weapon by many law enforcement agencies, but if you want to make your own just for fun, or if you know they are legal in your area, you can build your own iStab using the directions on this Instructable.