Carbide tip engraving burin / chisel

[Christophe Mineau]

And here is the last one :
Actually it is multi purpose, it can hold any kind of 3.2mm round tip, like an old HSS drill bit for instance.
Here it is mounted with a broken Dremel carbide bit, that I grounded with a diamond wheel.
It should be suitable for engraving the hardest steels.