Mount Neon R766 coarse grit center mount fiberglass heavy-duty flat flap discs on your right angle grinder to bevel, blend and deburr with excellent and economical performance. Engineered with alternating zirconia alumina and aluminum oxide flaps, these discs outperform standard aluminum oxide discs and work great on super alloys, cast iron, metals, titanium, soft-carbon steels and 300 and 400 series stainless steels. The smooth-running, high-density, semi-open flaps extend disc life, reduce loading and mimic fine grit flap discs. Featuring fiberglass/resin backing plates in the most popular backing plate configuration, these strong, lightweight flap discs absorb vibration for increased operator comfort.