Shaker agitator

FIG. 1 is a side perspective view of a shaker agitator embodying my new design;

FIG. 2 is a side perspective view thereof from another viewing angle;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a right elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is rear elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of a shaker agitator that form no part of the claimed design.