Joysun Zirconia Combi flap discs feature a unique design by using a special processing method of combining Zirconia abrasive materials in 2 different grits onto the same backing plate. This process leads to a significantly increased grinding efficiency and eventually minimized processing costs. These Zirconia Combi flap discs are perfect for aggressive stock removal, rough grinding and uniform fine surface finishing. Thanks to their flexible abrasive material, open structure and co-coolant filler, Joysun Zirconia Combi flap discs provide extremely fast stock removal, excellent surface conditioning and an extended service life for working with various metals including different steel types, titanium and aluminum to name a few.