4.5” x 7/8” Polish Plus Felt Flap Disc by BHA - Black Hawk Abrasives are an ideal choice for final stage polishing to a high gloss or mirror finish. The Polish Plus series flap disc features premium Australian wool felt flaps set in radial flap disc format allowing for buffing, polishing, and finishing on contoured or irregular surfaces with ease. The flap design offers the effectiveness of extra thick polishing disc at a more economical price while also allowing air flow to the work piece to reduce heat during use. The 4 ½ inch felt flapper disc is designed to be used with polishing paste or compound and is an ideal choice for polishing plastics, stone, glass, steel, stainless steel, aluminum, as well as other material depending on the polishing paste selected. With the fiberglass backing and 7/8” arbor this disc easily fits on a 4.5” angle grinder for quick, easy work.