The ornamental design for a casket handle, as shown and described.
FIG. 1 is a perspective view of the casket handle showing my new invention
FIG. 2 is a left side view thereof, the right side view being a mirror image of the left side view;
FIG. 3 is a front view thereof, the rear view being a mirror image of the front view;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The broken line showing of a casket and handle hardware is included for the purpose of illustrating environment and forms no part of the claimed design.