We claim the ornamental design for a cutting tool, as shown and described.
FIG. 1 is a perspective view of the claimed design;
FIG. 2 is a top view of the claimed design of FIG. 1;
FIG. 3 is a bottom view of the claimed design of FIG. 1;
FIG. 4 is a right side view of the claimed design of FIG. 1;
FIG. 5 is a left side view of the claimed design of FIG. 1;
FIG. 6 is a front view of the claimed design of FIG. 1; and,
FIG. 7 is a rear view of the claimed design of FIG. 1.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines are included to show portions of the cutting tool and form no part of the claimed design.