Staedtler single hole metal sharpener is for standard size pencils up to 8.2mm in diameter.  It has an extra long pencil guiding slot to prevent wedging.  Three point fixing of sharpener blades to ensure blade is true and cuts evenly.  It is made from diecast zinc for stability, precision and exceptionally long life.  Sharpening angle is 23 degrees for clear and accurate lines. 
 
As always, if you have any questions about this product or similar products don't hesitate to contact us at support@norcal-art.com!