Grinder Burr

FIG. 1 is a top perspective view of a grinder burr, showing my new design;

FIG. 2 is a front elevation view thereof, with the back and side elevation views being a mirror image thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines of FIG. 4 are for showing portions of a grinder burr and form no part of the claimed design. The dot-dash boundary lines of FIG. 4 are included to show relations of the holes to the interior bottom portion of the grinder burr only and form no part of the claimed design.