We claim the ornamental design for a handle for a power tool, as shown and described.
FIG. 1 is a perspective view of a handle for a power tool, embodying the new design.
FIG. 2 is a right side view of the handle shown in FIG. 1.
FIG. 3 is a left side view of the handle shown in FIG. 1.
FIG. 4 is a front view of the handle shown in FIG. 1.
FIG. 5 is a rear view of the handle shown in FIG. 1.
FIG. 6 is a top view of the handle shown in FIG. 1; and,
FIG. 7 is a bottom view of the handle shown in FIG. 1.
The even broken lines represent portions of the article that form no part of the claimed design. The uneven broken lines represent boundaries of the design and form no part of the claimed design.