The ornamental design for a screwdriver, as shown and described.
FIG. 1 is a perspective view of a screwdriver, the screwdriver having a handle with an inner structure disposed within an outer unclaimed portion of the handle, the inner structure being visible from outside the outer unclaimed portion of the handle;
FIG. 2 is a perspective view from a second end of the screwdriver, distal from the shaft end of FIG. 1.
FIG. 3 is a side view of the screwdriver according the orientation shown in FIG. 5 with an opposite side being a mirror image.
FIG. 4 is a top view of the screwdriver according the orientation shown in FIG. 5 with a bottom view being a mirror image.
FIG. 5 is a view of the second end of the screwdriver, showing the inner structure; and,
FIG. 6 is a view of the shaft end of the screwdriver.
The broken lines in FIGS. 1–6 are for illustrative purposes only and form no part of the claimed design.