I remembered I had one of these so decided to make a holder for it today. I don't know which side is the cutting side. I think it is the relieved edge but not sure.
This is the insert i have.
http://www.arwarnerco.com/p-116-tnmc-32-nv.aspx
This is the insert i have.
http://www.arwarnerco.com/p-116-tnmc-32-nv.aspx