From the manufacturer:
Two holes for different pencils. For standard-sized blacklead pencils up to 8.2 mm Ų with a sharpening angle of 23° for clear and accurate lines. For standard-sized coloured pencils up to 8.2 mm Ų with a sharpening angle of 30 ° for broad, soft lines. For thick blacklead and coloured pencils up to 10.2 mm Ų with a sharpening angle of 30° for broad, soft lines. Metal sharpener insert. Hinged cover prevents shavings from spilling. Lid with safety lock to avoid accidental opening