I claim the ornamental design for a double-sided narrow chisel blade, as shown and described.
FIG. 1 is a perspective view showing the new design.
FIG. 2 is a top view showing the new design, which is a mirror image of the bottom view showing the new design.
FIG. 3 is a side view showing the new design, which is a mirror image of the opposite side view showing the new design; and,
FIG. 4 is a front view showing the new design, which is a mirror image of the rear view showing the new design.
The shading lines shown in the drawings represent the approximate three-dimensional contour of the design, and are not intended to indicate surface decoration.