Cool 3d-printed Self-Centering Chuck Design

This thing is pretty cool looking, and i like it out of hand because you can print your own, but what would one use such a thing for? The quote in the article mentions woodworking, but this doesn't seem sturdy enough for say, a spinning lathe or something to that order. Am I off base in that, or is this more of an interesting prototype?

http://fabbaloo.com/blog/2013/9/9/design-of-the-week-four-jaw-self-centring-chuck.html

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Tags: 3d printing, tool
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