The ornamental design for a handle, as shown and described.
FIG. 1 is a top perspective view of the handle showing my new design.
FIG. 2 is a side view thereof.
FIG. 3 is another side view thereof.
FIG. 4 is a back view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The evenly spaced broken lines illustrate portions of the design that form no part of the claimed design. The long and short broken lines on the handle define the bounds of the claimed design and form no part thereof.