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The ornamental design for an anti-skid heel attachment, as shown and described. |
FIG. 1 is a perspective view of an anti-skid heel attachment showing my new design;
FIG. 2 is a front elevation thereof;
FIG. 3 is a left side elevation view, the right side being a mirror image thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a rear elevation thereof; and,
FIG. 6 is a bottom plan view thereof.
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