Multi-wrench

FIG. 1 is a top front perspective view of a multi-wrench, showing my new design; FIG. 2 is a top rear perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a rear elevation view thereof; FIG. 5 is a right-side elevation view thereof; FIG. 6 is a left-side elevation view thereof; and, FIG. 7 is a top plan view thereof, the bottom plan view is a mirror image thereof. The broken lines shown in the drawings depict portions of the multi-wrench that form no part of the claimed design.