These mounting plates are the ones needed when replacing Fender's 2-pin machine heads. Although GraphTec Ratio tuners come with a selection of mounting plates, this type is not included, probably because they need to be thicker than the simple pressed plates used for other types of tuners.
With these plates fitting Ratio tuners just takes a few minutes, and needs no drilling or other modifications to the headstock. And the results look great as the chrome plates and tuners blend together perfectly.