The ornamental design for a cover for handle of a screw driver, as shown and described.
FIG. 1 is a front view of the cover for the screw driver handle, the side
opposite this view presenting essentially the same design except for the
absence of the round button shown in this view;
FIG. 2 is a view of the right-hand side of the cover of FIG. 1, the
left-hand side presenting essentially the same design;
FIG. 3 is a view of the top of the cover of FIG. 1; and
FIG. 4 is a view of the bottom of the cover of FIG. 1.