The Staedtler Heavy Metal Single Hole Sharpener has an extra-long pencil gliding slot that prevents wedging, while cut-out makes it easy to remove broken tips.
The Staedtler Heavy Metal double-hole sharpener is for standard-sized blacklead pencils up to 8.2mm with a sharpening angle of 23 for clear and accurate lines. It is also used for thick black lead and coloured pencils up to 10.2mm with a sharpening angle of 30 for broad and soft lines.
The Staedtler Double Hole Tub Sharpener has a lid with a safety lock to avoid accidental opening. It helps quickly sharpen your writing and drawing pencils.