These pushnuts hold the display shield and speaker mounts to the bezel in most WPC-95 machines. Once on, they are hard to get off. Use a strong pair of diagonal cutters to crack them, then they come off easily.
A 20 pack is enough for a complete strip and replacement of a WPC-95 speaker panel, with a few left over. It is only necessary to remove two of each of the four speaker mount pushnuts, but you will have to remove all of the display nuts.