The ornamental design for an oval-headed universal wrench, as shown and described.
FIG. 1 is a perspective view of an oval-headed universal wrench, including an array of holes in the handle.
FIG. 2 is a top plan view of the wrench shown in FIG. 1.
FIG. 3 is a bottom plan view of the wrench shown in FIG. 1.
FIG. 4 is a handle-end view of the wrench shown in FIG. 1.
FIG. 5 is a head-end view of the wrench shown in FIG. 1; and,
FIG. 6 is an elevation view of the wrench of FIG. 1. The wrench is symmetrical around a plane parallel to the viewing plane passing through the wrench's longitudinal central axis, as apparent in FIGS. 2-3.