I claim the ornamental design for a hand grips for an exercise device, as shown and described.
FIG. 1 is a rear side perspective view of a set of hand grips for an exercise device;
FIG. 2 is a top view of the hand grips of FIG. 1;
FIG. 3 is a first side view of the hand grips of FIG. 1;
FIG. 4 is a second side view of the hand grips of FIG. 1;
FIG. 5 is a front view of the hand grips of FIG. 1;
FIG. 6 is a rear view of the hand grips of FIG. 1;
FIG. 7 is an enlarged rear side perspective view of the hand grips of FIG. 1;
FIG. 8 is an enlarged top view of the hand grips of FIG. 1; and,
FIG. 9 is an enlarged first side view of the hand grips of FIG. 1.
The ornamental design that is claimed is shown in solid lines in the drawings. The broken (dashed) lines shown in the drawings are included for the purpose of illustrating environmental elements only and form no part of the claimed design.