Bevel, blend, deburr and remove stock with high speed and efficiency using Metal R828 coarse grit arbor thread fiberglass conical flap discs. Engineered with angled polyester/cotton flaps, a high surface area and a durable zirconia grain, these long-life, type-29 flap discs work great on edges and contoured surfaces and efficiently cut titanium, super alloys, cast iron, and soft-carbon, and 300 and 400 series stainless steels. Featuring the most popular backing plate configuration on the market, these fiberglass/resin-backed flap discs are strong and lightweight, and they also absorb vibration, enhancing operator comfort.