? Self-sharpening, zirconia alumina abrasive with grinding aid provides cooler cut, longer life on hard to grind materials. ? Superb performance from the zirconia grain and grinding aid combination. ? All QC cloth discs are designed to run on back-up pads that are rated at or above the RPM of the grinder. ? For applications that require better/decorative finishes, please refer to non-woven quick change discs. ? 60, 80 & 100 grit are recommended for blending and deburring. ? Type TS/II fit turn-on/turn-off metal attachment system. ? Manufactured with special flexible cloth where the outer 3/8 In. is more flexible than the rest of the disc for use on contoured surfaces. ? Merit supplies the most comprehensive quick change offering in the industry, with the largest variety of abrasives, backings and locking mechanisms. We are committed to consistently provide the highest quality of products that will finish the job and increase your profits.