The IVY Classic 42201 Flex-Abrasive Zirconia Flap Disc 4-inch diameter with a 5/8-inch arbor hole, 60 coarse grit is used for grinding, blending welds, deburring, cleaning, stripping, and finishing on metal and stainless steel surfaces. The type 29 design disc with angled flaps for better surface contact and faster stock removal.