Designed by Jonathan Sabine and Adam Pickard, the “ninja tacks” may look deadly in appearance, but they’re only elaborate thumbtacks in reality. Too bad these things are only conceptual for now as they might have come in handy as intimidation devices.

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I actually have an eight cornered shuriken at home. Can't tell you how many holes/dents I've got in my doors and walls now. :)
I actually have an eight cornered shuriken at home. Can’t tell you how many holes/dents I’ve got in my doors and walls now. :)
where can you buy?
You can't.. it's a concept :(
where can you buy?
You can’t.. it’s a concept :(