Derwent has two battery operated sharpeners. The five hole sharpener sharpens up to four different pencil diameters, has a rotating base and the ability to alter the sharpness of the pencil points. Our Superpoint helical sharpener with its long lasting steel rotary cutter ensures that an extra long point is delivered in seconds every time. This sharpener has a simple and easy to empty transparent shavings reservoir and comes with a free cleaning brush. The sharpener requires 4 x AA batteries which are not included.