@@TOGITOGI If I assume that the length of the deba blade is 15cm. It has a thick break at the beginning of the edge (towards the handle). Of course, this rift existed, but it remained. It has micro cracks at 8-10 cm and 1-3 cm. before the end of the peak as clearly seen at 15:03. Also, the tip of the blade is not properly shaped, the spine of the knife needed to be lowered by about 2-3 mm to form a proper tip of the blade.