Jim Stewart explained on 1/5/2009 :
I have to make a number of fussy little
groove and radius lathe cutters. Grinding
a HSS insert would be easier than grinding
them out of a full size lathe tool.

These are the only ones I know about.
http://www.littlemachineshop.com/pro...ry=-1550042347

I don't know if they'd fit a carbide holder or if you have to get
the Warner holders also.

I got a set of the their holders and bits. I prefer HSS and am
too lazy to grind bits if I don't have to.

Wayne D.