This is a set of the takoyaki plate, the yakiniku plate (dome-shaped), the replacement plate, and the dedicated metal spatula for the Toshiba hot plate HGK-12WK. It has been stored unused since the purchase of the hot plate. There may be some dirt due to storage. I have used the dimple plate with HGK-10WK, and it worked the same way. HGK-10WK only comes with a flat yakiniku plate, so I think it can also be used with HGK-10WK. It cannot be used without the HGK-12WK or HGK-10WK hot plate body.