This versatile sharpener actually fits three sizes of pencils, due to the removable ring in the larger of the two holes.
Since Ere Perez pencils are made entirely of wood, they may swell in the humid weather. This is another reason this sharpener is made with three different size openings.
Use the removable grey tool to clean debris from your sharpener. This tool also works as a screwdriver (amazing!) so that you can remove the blades to properly recycle your sharpener, or to give it a really good cleaning.