The back of the blade (the dull edge) in this section is usually filed with a series of grooves or notches. The third and longest section of the blade extends to the point, and is double-edged with a diamond cross-section. It will occasionally have notches or serrations for a short distance along the edge which corresponds to the back of the previous zone.
The rear of the blade (the blunt edge) in this section is typically filed with a series of grooves or notches. The third and longest part of the blade extends to the tip, and is double-edged with a diamond cross-section. It may occasionally have notches or serrations for a short distance along the edge which corresponds to the back of the preceding zone.