Set of key buttons for a handset
US D571794 S1
The ornamental design for set of key buttons for a handset, as shown and described.
FIG. 1 is a front view of a set of key buttons for a handset showing our new design; and,
FIG. 2 is a perspective front view thereof.
The broken line showing of the remainder of the handset is for illustrative purposes only and forms no portion of the claimed design.