VEVOR Dividing Head BS-0 5Inch 3 Jaw Chuck Dividing Head Set Precision Semi Universal Dividing Head for Milling Machine Rotary Table Tailstock Milling Set (5 Inch Chuck)

It comes with 3 indexing plates for any combination you might need. The most important thing you need to do before using is take it completely apart including the chuck and deburr , clean and put in some good grease and oil, it is horrendously dirty inside, otherwise it seems of good quality.

Here is a instruction link :http://qiniu.vevor.net/20200525162933412.pdf.

Yes, it can be used with a CNC.

The total height is 250mm.

A semi-universal can only cut straight gears as where the universal models have linkages that allow helical cut gears to be cut.