We claim the ornamental design for a baking tool handle, as shown and described.
FIG. 1 is a perspective view of the claimed design;
FIG. 2 is a front view of the claimed design;
FIG. 3 is a back view of the claimed design;
FIG. 4 is a left side view of the claimed design;
FIG. 5 is a right side view of the claimed design;
FIG. 6 is a top view of the claimed design; and,
FIG. 7 is a bottom view of the claimed design.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.