I claim the ornamental design for a cutting tool attachment for a surgical microsaw, as shown and described.
FIG. 1 is a left side view of a cutting tool attachment for a surgical microsaw showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a top, rear, right side perspective view thereof.
The light shaded showing of a saw blade demarked by a dotted line is for the purpose of illustrating environmental structure and forms no part of the claimed design.