The ornamental design for a handle, as shown and described.
FIG. 1 is an isometric view of a handle incorporation my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof:
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines depict portions of the handle in which the design is embodied that are not considered part of the claimed design. The dot dash lines define the boundaries between claimed and unclaimed areas of the handle.