Set of 3 spare parts for Derwent electric double-ended pencil sharpener There's nothing worse than a blunt pencil! Whether you are looking for a simple manual pencil sharpener or a more sophisticated one with batteries: we are sure we have what you need! Sharpens both jumbo (9-12mm) and standard (6-8mm) pencils Sharpening holes covered for safety. Durable, high-quality blades. For the Derwent Double Ended Electric Pencil Sharpener. Measurements: two of 8 mm and one of 12 mm. Brand: Stabilo