The ornamental design for a combinationwrench, as shown and described.
FIG. l is a perspective view of a combination wrench showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an assembled view for showing the combination wrench which is assembled to a handle, wherein the broken line portion is for illustrative purpose only and forms no part of the claimed design.