Staedtler double metal pencil sharpener Two-entry metal pencil sharpener. Single for standard size graphite pencils with a diameter of up to Ø 8.2 mm and a sharpening angle of 23° for fine, precise lines and thick graphite and color pencils with a diameter of up to 10.2 mm and a 30° sharpening angle for wide, smooth lines. Brand: Staedtler.