The ornamental design for a cutterblade, as shown and described.
FIG. 1 is a perspective view of a cutter blade, shown in use cutting pizza;
FIG. 2 is a perspective view of the cutter blade;
FIG. 3 is a front elevation view of the cutter blade, the rear elevation view being a mirror image thereof;
FIG. 4 is a left elevation view of the cutter blade, the right elevation view being a mirror image thereof;
FIG. 5 is a top elevation view of the cutter blade; and,
FIG. 6 is a bottom elevation view of the cutter blade.
The pizza, a handle for the cutter blade, and the holes formed within the cutter blade are shown in broken lines for illustrative purposes only and form no part of the claimed design.