I claim the ornamental design for an anti-backlash cam tool, as shown and described.
FIG. 1 is a perspective view of an anti-backlash cam tool according to the present design, and showing a prior art three-jaw chuck in phantom, the chuck forming no part of claimed design;
FIG. 2 is a further perspective view of the anti-backlash cam tool;
FIG. 3 is a top edge view of the anti-backlash cam tool;
FIG. 4 is a plan view showing a first major surface of the anti-backlash cam tool;
FIG. 5 is a bottom edge view of the anti-backlash cam tool;
FIG. 6 is a rear edge view of the anti-backlash cam tool;
FIG. 7 is a plan view showing a second major surface of the anti-backlash cam tool; and,
FIG. 8 is a front edge view of the anti-backlash cam tool.