The Derwent Battery Operated Twin Hole Sharpener can sharpen both large (9-12mm) and small (6-8mm) diameter pencils, perfect for achieving a sharp point quickly. The compact size is ideal for taking out and about. The high quality durable blades can withstand hours of sharpening and replacement sharpeners are available separately. A broken tip remover ensures any blockages are dealt with quickly. The visible reservoir captures the pencil shavings and these can be disposed of with the easily removed cover.