Black Hawk 3" Cubic Zirconia Quick Change Discs are versatile abrasive. Black Hawk disc surface prepping in the microwave; Made of high quality aluminum oxide grits and use a threaded plug, plastic roll-on attachment for attachment (equivalent to 3m Roloc attachment). Looking to remove oxidation, paints or wax in small areas? Maybe youre a welding to clean, deburring or just general grinding. Regardless of the work Black Hawk 3" Cubic Zirconia Quick Change Discs are a good choice.