Get excellent performance and efficiency when using the Red Heat R961 coarse grit center mount fiberglass conical flap disc. The polyester/cotton flaps are angled to help speed up your job by improving surface contact and removing stock from edge and contour work, while the ceramic alumina and zirconia alumina abrasive blend performs consistently on cast iron, 400 series stainless steels and soft carbon steels. In addition to blending, deburring and removing stock, the disc absorbs vibrations due to its lightweight, fiberglass and resin-backing construction for operator comfort.