I claim the ornamental design for a handle, as shown and described.
FIG. 1 is a front left perspective view of a handle;
FIG. 2 is a front elevation view thereof, which is the same as a rear elevation view thereof;
FIG. 3 is a left side elevation view thereof, which is the same as a right side elevation view thereof;
FIG. 4 is a bottom rear left perspective view thereof; and,
FIG. 5 is a top front right perspective view thereof.
Uniform broken lines show environmental structure that forms no part of the presently claimed design, while the broken lines of symbolic break illustrate that the marked items can vary dimensionally along the interrupted longitudinal axis within the scope of the presently claimed design and the portion of the design between those symbolic break lines forms no part of the claimed design.