The ornamental design for a handle, as shown and described.
FIG. 1 is top plan view of a handle according to the present design.
FIG. 2 is a right elevation view thereof, the left elevation view being identical.
FIG. 3 is top right perspective view thereof; and,
FIG. 4 is a bottom right perspective view thereof.
The claim is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.