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 section of the blade in this context typically features a series of grooves or notches. The longest part of the blade extends to the tip and is double-edged with a diamond-shaped cross-section. Occasionally, it may have short notches or serrations along the edge that correspond to the back of the preceding cutting area.