The most popular all rounder knife steel from Japan, this is a 23-Layer (11 layer each side and a VG10 core) damascus VG10 Billet from Takafu.
This particular stock is in Sanmai Damascus constuction, namely it come with a VG-10 core and cladded with soft stainless damascus steel, in a 3 layer constuction. This means the knife will be much easier to sharpen after heat treatment and when the user needs to thin the knife, it could be done with a whetstone rather than have to use a machine (which is not that practical, this is one of the reasons that I am not a big fan of PM monosteel knives).
Measurement: 360mm x 57mm x 3.5mm