The ornamental design for a toolbox, as shown and described.
FIG. 1 is a perspective view of a toolbox showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a perspective view of the toolbox shown in FIG. 1 in a selectively open position; and,
FIG. 8 is a perspective view of the toolbox shown in FIG. 1 in a selectively open position with tools in the toolbox.
A bottom view thereof is omitted since it does not contain ornamental features. The broken lines shown in FIGS. 1-7 are for the purpose of illustration only and form no part of the claimed design. The broken lines showing of the tools in FIG. 8 illustrate environment and form no part of the claimed design. The broken lines showing portion of the toolbox in FIG. 8 are for the purpose of illustration only and form no part of the claimed design.