Tamahagane PRO knives are made of very pure molybdenum/vanadium stainless steel. The purity is superior to Swedish Steel which is commonly known to be quite pure.
Each PRO knife is receives a special heat treatment with quenching at 1050 degrees centigrade. Each knife is then cooled to below minus 73 degrees centigrade. This heat and cooling treatment enhances hardness, durability and edge retention.
To facilitate resharpening, the base blade of the PRO knives is wet honed with coarse and medium grindstones by skilled craftsmen prior to the formation of the primary blade. The final blade honing is also done by hand to insure that each knife will stay sharp long.