The ornamental design for a universal skateboardtool, as shown and described.
FIG. 1 is a top view of an embodiment of a universal skateboard tool.
FIG. 2 is a bottom view of the embodiment of FIG. 1.
FIG. 3 is a right side view of the embodiment of FIG. 1.
FIG. 4 is a left side view of the embodiment of FIG. 1.
FIG. 5 is a rear view of the embodiment of FIG. 1.
FIG. 6 is a front view of the embodiment of FIG. 1; and,
FIG. 7 is a front elevation view of the embodiment of FIG. 1.
The boundary of the claim extends to the ends of the solid lines. The broken lines shown in the drawings are directed to unclaimed portions of the universal skateboard tool and form no part of the claimed design.