The ornamental design for a multi-purpose tool, as shown and described.
FIG. 1 is a perspective view of a multi-purpose tool showing my design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a first side view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The even-length broken lines are directed to environment, represent unclaimed subject matter, and form no part of the claimed design. The long and short broken lines form an unclaimed boundary around a portion of the multi-purpose tool and form no part of the claimed design.
The multi-purpose tool is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.