Derwent Pencil Sharpener, Battery Operated, For 4 Pencil Diameters (2301934) Sharpens up to 4 different pencil diameters (8mm to 11mm); rotate base to achieve the point you prefer High quality durable blades won't chew up your pencils; achieve a variety of perfect points from shallow to deep Pencil sharpener has a see thru shavings reservoir; 4 AA batteries (not included)