These non-woven buffs create a satin/matte finish on treated or untreated parts. After parts are antiqued (with pewter black or a similar material), these buffs are used to apply a satin finish to raised surfaces, leaving a darker color in recessed areas. Each wheel is 1/4" thick and has a 1/2" dia. hole. Can be stacked together on straight flanged arbors with 1/2" external threads. Very fine grit. Made in USA.