This media has a patented shape without any flat, parallel surface areas. On the one hand this unique design prevents media lodging in the work pieces, which can occur particularly in case of complex work pieces. Such lodged media can severely affect the finishing process and must frequently be removed by hand. On the other hand, the shape with its rounded surface areas allows the surface refinement of work pieces, which to-date could not be handled by mass finishing at all or only with very complicated operational setups. This includes components with difficult-to-reach surface areas like tight radii, undercuts, notches and slits, which can frequently be found in stamped and bent components.