FIG. 1 is a bottom perspective view of a locking cannula showing our new design;

FIG. 2 is a left side elevational view, the right side being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view, the rear elevational view being a mirror image thereof; and,

FIG. 5 is a bottom plan view thereof.