Flap Disc

is a type of abrasive tool used for grinding, polishing, and finishing metal, wood, and other materials. It consists of multiple overlapping layers of abrasive material (usually sandpaper) bonded to a backing plate. The abrasive material can be made from various materials such as aluminum oxide, zirconia alumina, ceramic, or diamond. Flap discs are typically used with angle grinders and come in various grit sizes for different levels of abrasiveness. They are popular in metalworking and fabrication industries for tasks like deburring, rust removal, and surface blending.