I have two. Arizonas I think.
One does three vanes at a time which is good for new shafts.
Other one does a single vane at a time which I like for replacing vanes and I have different clamps for whichever type vane it needs. I do some for friends also.
They're cheap plastic but have worked for 20 years or so but if I had to by one today I would go with the Bitz.
Definitely higher quality.