I have this one. I like it a lot.
https://www.amazon.com/gp/prod...le?ie=UTF8&psc=1
It crimps the ferrule tips into a hex (which is close to round). They have ones that crimp it into a square. The tool is great and they give you 1900 ferrules. They work really well with Euro style terminal blocks or in the case of the other type (like MTH) where the wire goes under the screw head, the ferrule tips fit in there very well if not too thick.
John