The ornamental design for an open endwrench, as shown and described.
FIG. 1 is a left perspective view of an open end wrench showing our new design;
FIG. 2 is a right perspective view thereof;
FIG. 3 is a front plan view thereof;
FIG. 4 is a rear-plan view thereof;
FIG. 5 is a detailed left perspective view of the engagement features taken in FIG. 1 thereof;
FIG. 6 is a detailed right perspective view of the engagement features taken in FIG. 2 thereof;
FIG. 7 is a detailed front perspective view of the engagement features taken in FIG. 3 thereof; and,
FIG. 8 is a top plan view thereof.
The broken line showing the tool body in FIGS. 1-8 are included for the purpose of showing environmental structure and form no part of the claimed design.