Invented in 1913 and miniaturised in 2025 - MetMo Fractal Vise has launched on Kickstarter! 
The world’s most fractical vise with jaws made to clamp any shape…
The accessories are very interesting!
I am guessing that prototypes have been getting a workout in prepping parts for products?
Hi Will, yes the prototypes were definitely put through their paces and we plan to put them through a few more! 
Interesting example of this sort of mechanism being used for guitar-making:
I was thinking about your latest post about the history of the fractal vise. More specifically, that one of the reason it dissapeared was that the positionning was not repetable. There would be a way to make it more reppeatable, you just need to be able to lock one of the main half circles. It wouldn’t loose much of the fit anything feature and it would permit to clamp the same shape in the same way very easily. Adding a reference point to the outside (endstop) would even make it almost perfectly repetable.
That’s a neat idea, I think it would be an interesting challenge to design this we don’t have a lot of space on the crescents, but you could modify the pins that hold them in so that they had a cap that could be tightened and fix the jaws in a set position… that may not be strong enough to hold them but could be fun to try out, and if it worked that would give you this set position.
This is a great find, I haven’t seen one of these before it reminds me a bit of the CNC metal forming presses. A vertical clamp like this might be quite useful?
How about a screw in one of the ends and a tapped hole in a crescent?