The ornamental design for a razor handle, as shown and described.
FIG. 1 is a perspective view of a design of a razor handle of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a rear perspective view thereof.
The broken lines disclosure of the cartridge illustrates the environment. The remaining broken lines illustrate portions of the razor handle. None of the broken lines form part of the claimed design.