This new and improved Derwent Twin Hole Pencil Sharpener includes a dual size metal sharpener with sharp, effective carbon steel blades. Long lasting and high quality, these blades produce smooth, consistent results and sharp points every time. It is ergonomically designed so is comfortable to hold and has a modern tinted reservoir with a flip top cap. This dual size sharpener will take pencils up to sizes 8.25mm and 11.5mm.