Crowne Tools Diamond Flap Disc Premium diamond grinding flap discs by Crowne Tools — designed for fast material removal, durable performance, and smooth surface prep on concrete, masonry, stone, and hard coatings. Features Aggressive yet consistent grinding with segmented diamond technology — stays cooler and lasts longer than conventional abrasive discs. Versatile use on concrete, grout, terrazzo, coated surfaces, stone, and masonry. Fits standard 3″ angle grinders with 7/8″ arbor. Durable build for pro contractors and serious DIYers.. Available Grit Sizes 60 Grit – Aggressive Removal: Rapid stock removal and smoothing of rough concrete and coatings. 120 Grit – Medium Smooth Finish: Balanced grinding and surface refinement before coatings. 200 Grit – Finer Surface Prep: Final prep for polish, sealers, or paint—smooth and consistent. Applications Surface leveling and edge grinding Smooth roughness and micro-profiling before coatings Prep for sealers, overlays, and polished finishes Removing minor ridges, coatings, or residues