Joysun synthetic felt polishing flap discs are designed and manufactured with special buffing materials made from synthetic fibers and cotton fiber. They are produced in several densities and thickness and the flaps are fitted in a fan type configuration. They are widely used for soft flexible polishing applications and work best when used with polishing pastes or other compounds. You can achieve a mirror finish on a variety of stainless steel, high tensile alloys, aluminum alloy, glass, plastic, marble and stone.