The ornamental design for a microdermabrasionhandpiece, as shown and described.
FIG. 1 shows a front perspective view of a design for a microdermabrasion handpiece.
FIG. 2 shows a top view of the design.
FIG. 3 shows a bottom view of the design.
FIG. 4 shows a right side view of the design.
FIG. 5 shows a left side view of the design.
FIG. 6 shows a front view of the design; and,
FIG. 7 shows a back view of the design.
The broken lines in the drawings are included for the purpose of illustrating portions of the microdermabrasion handpiece that form no part of the claimed design.