US D599906 S1
The ornamental design for a surgical drill, as shown and described.
FIG. 1 is a perspective view of a surgical drill showing my new design;
FIG. 2 is side view thereof;
FIG. 3 is a side view of FIG. 2 rotated 180 degrees;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.