The ornamental design for a handle, as shown and described.
FIG. 1 is a perspective view of the handle showing my new design.
FIG. 2 is a right side plan view of the handle.
FIG. 3 is a front elevation view of the handle.
FIG. 4 is a left side plan view of the handle.
FIG. 5 is a rear view of the handle.
FIG. 6 is a bottom view of the handle; and,
FIG. 7 is a top view of the handle.
The dashed lines seen in FIGS. 1 through 7 which illustrate a rotary cutting blade are for illustrative purposes only and form no part of the claimed design.