The ornamental design for a wrench, as shown and described.
FIG. 1 is a perspective view of the wrench, showing my new design;
FIG. 2 is front view of the wrench shown in FIG. 1;
FIG. 3 is a rear view of the wrench shown in FIG. 1;
FIG. 4 is a left side view of the wrench shown in FIG. 1;
FIG. 5 is a right side view of the wrench shown in FIG. 1;
FIG. 6 is a top view of the wrench shown in FIG. 1; and,
FIG. 7 is a bottom of the wrench shown in FIG. 1.
The broken lines shown in the drawings are only for the purpose of illustrating unclaimed portions of the wrench and form no part of the claimed design.