Black Hawk 2" Zirconia Quick Change Discs are an extremely versatile abrasives. Black Hawk sanding discs are made with the highest quality Zirconia grains and use a threaded male, plastic roll on attachment for fastening. These Zirconia discs last twice as long as the aluminum oxide variety. Looking to get into small areas to remove scale oxidation, paints, or waxes? Maybe you're cleaning up a weld, deburring, or just general grinding. Whatever the job Black Hawk 2" Zirconia Quick Change Discs are a great option.