? Non-Woven Depressed Center Disc,Surface Conditioning Discs ? Complete stripping and removal of parting lines, rust and stock when you attach this Bear-Tex Blaze Rapid Strip CA coarse grit non-woven depressed center disc to your right angle grinder. This extra coarse grit disc is ideal for work on aluminum, cast iron, fiberglass and masonry, and it doesn't shed or snag when you're working on rusty pieces. Its Rapid Strip material provides aggressive performance over an extended period, and the ceramic grain is twice as fast and consistent as silicon carbide discs. ? Blaze ceramic grain provides 2X plus faster, consistent rate and life than S/C discs, leaves a thoroughly cleaned surface, ensuring excellent adhesion in subsequent processes such as painting and soldering ? Open web construction for minimal loading; does not shed or snag on rusty pieces; prevents gouging and rework ? Rapid Strip material provides a unique combination of aggressive performance, long life, and improved finish ? Extra coarse grit for stripping and removing parting lines, rust and coatings on aluminum, cast iron, concrete, fiberglass and composites, carbon steels, masonry, and stone ? Non-rusting; no workpiece contamination