A grinding medium with a medium grit of 240 made from white aluminum oxide. The white aluminum oxide features a finer and more open grain structure, making it excellent not only for wood and metal surfaces but also for paints and varnishes. A long-lasting grinding performance is ensured by the grid structure. The grinding dust is removed much more effectively from the workpieces being treated, preventing any negative impact on the grinding grain. The existing hook-and-loop attachment allows for quick and easy fastening to the machine. To guarantee optimal grip and the longevity of the grinding medium, the optionally available grinding disc protection must be placed between the grinding medium and the grinding disc.