Joysun Alumina series of flap discs are manufactured by the refined aluminum oxide grains with INOX rated sulfur and chlorinated fillers that are bonded onto the flexible cotton backing cloth. All fillers are free from iron.

These alumina flap discs are featured by its high stock removal even at low contact pressures, its flexibility and durability, which provides a long lasting and dynamic functionality. They offer an excellent grinding efficiency, a unique finish on materials with poor thermal conductivity and they can also provide significant cost savings when used with minimum contact pressure with variable-speed angle grinders at low RPM. These flap discs are perfect for stock removal, edge grinding, welded seams blending, deburring, de-flashing, surface finishing on various metals including carbide steel, aluminum, non-ferrous metals, plastics and wood.