Hello everyone so I recently purchased a Van Norman mill 3R-10 and it came with a tool holder in the spindle and I’m trying to see if anyone has any insight as to what this is I think it might use collets of some kind but not sure what here is a few pics of what I got any help would be appreciated I have a bridge port mill and am familiar with the R-8 spindle but have never had any experience with the 50 taper tooling