3M Roloc disc 361F offers a quick-change attachment and provides durability and high performance for grinding, blending, deburring and finishing on all metals. Fast cutting aluminum oxide abrasive grains are bonded to the heavyweight cloth backing with durable, heat resistant resin that supports both wet and dry applications. - 3M Roloc discs provide a fast, efficient method for grinding, blending, leveling and finishing on all types of metal. They lock securely in place with just a half twist another half twist and they're off. Each disc is color-coded by grade.