The ornamental design for a grindersafetygauge, as shown and described.
FIG. 1 displays a right side elevation view of the grinder safety gauge.
FIG. 2 presents a perspective view, from the bottom of the grinder safety gauge, according to its design.
FIG. 3 is a view of the top surface of the grinder safety gauge; and,
FIG. 4 is a view of the bottom surface of the grinder safety gauge.
The grinder safety gauge as shown is primarily a rectangular structure with sunken, indented pocket panels comprising two-thirds of its length and a stepped-down, tiered surface forming the remaining one-third of its length.