Modern Combative Systems is proud to announce the Jaw Jacker polymer knuckleduster, a collaboration between George Matheis and Jeff Ferrand at Alpha Innovations.

Even though they are only made out of indestructible polymer they would still be considered knuckles and illegal in most places.

The Jaw Jacker is only intended as a collectors item and as an example of what a knuckleduster designed to cause the maximum amount of damage would look like. Under no circumstances should you ever strike a human with the Jaw Jacker.

http://www.alphainnovationsselfdefense.com/