The ornamental design for a handle, as shown and described.
FIG. 1 is a perspective view of the handle;
FIG. 2 is a lower perspective view of the handle;
FIG. 3 is a top view of the handle;
FIG. 4 is a bottom view of the handle;
FIG. 5 is a first end view of the handle;
FIG. 6 is a second end view of the handle;
FIG. 7 is a front view of the handle; and,
FIG. 8 is a rear view of the handle.
The broken lines showing in the figures are included for the purpose of illustrating portions of the handle that form no part of the claimed design. The handle 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.