Not sure

[sdelivery]

This was in a box of tooling that came out of Lockheed Martin when I bought my first lathe. I DON'T believe it is a lathe tool.
I believe it is designed to chamfer but I am not sure why the second backwards carbide insert............

 

[markba633csi]

Looks like some type of shop made flycutter

 

[sdelivery]

With the two carbide inserts set up the way they are it looks like they were chamfering tubing