Beater attachment for a handheld mixer

FIG. 1 is a perspective view of a beater attachment for a handheld mixer according to the design;

FIG. 2 is a front elevation view thereof with a back elevation view being identical thereto;

FIG. 3 is a right side elevation view thereof with a left elevation view being identical thereto;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a partial enlarged perspective view thereof according to the area indicated in FIG. 1 .

The portions of the article shown in broken line form no part of the claimed design.