Grinding Disc

FIG. 1 is a front elevation view of a grinding disc embodying my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top-front-side perspective view thereof.

The broken lines are illustrative of portions of the device forming no part of the claimed design.