The ornamental design for a handle for a massagedevice, as shown and described.
FIG. 1 is a top perspective view of the handle for a massage device;
FIG. 2 is a front plan view thereof;
FIG. 3 is a back plan view thereof;
FIG. 4 is a first side elevational view thereof;
FIG. 5 is a second side elevational view thereof;
FIG. 6 is a top elevational view thereof; and,
FIG. 7 is a bottom elevational view thereof.
The thin solid lines in the views have been provided for the purpose of illustrating the uniformity of the planar surfaces and the contour of the surfaces and are not a claimed surface pattern.
The broken lines shown in the figures are for the purpose of illustrating environmental structure, which form no part of the claimed design.