The ornamental design for a tool handle, as shown and described.
FIG. 1 is a top left front perspective view of a tool handle showing our new design;
FIG. 2 is a top left rear perspective view thereof;
FIG. 3 is bottom right front perspective view thereof;
FIG. 4 is bottom right rear perspective view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a right elevational view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a left elevational view thereof;
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a bottom plan view thereof.
The portions of the tool handle shown in broken lines form no part of the claimed design. The dash-dot lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof.