The ornamental design for tool holder, as shown and described.
FIG. 1 is a perspective view of a tool holder in accordance with one embodiment.
FIG. 2 is a top side view of the tool holder of FIG. 1.
FIG. 3 is a front side view of the tool holder of FIG. 1
FIG. 4 is a right side view of the tool holder of FIG. 1.
FIG. 5 is a rear side view of the tool holder of FIG. 1.
FIG. 6 is a bottom side view of the tool holder of FIG. 1.
FIG. 7 is a perspective view of a tool holder in accordance with another embodiment.
FIG. 8 is a top side view of the tool holder of FIG. 7.
FIG. 9 is a front side view of the tool holder of FIG. 7.
FIG. 10 is a right side view of the tool holder of FIG. 7.
FIG. 11 is a rear side view of the tool holder of FIG. 7; and,
FIG. 12 is a bottom side view of the tool holder of FIG. 7.
The broken lines shown in the drawings are for the purpose of illustrating unclaimed portions of the tool holder and form no part of the claimed design.