While it was once common to sharpen graphite and coloured pencils with a knife, we now use specially-designed sharpeners to do the job. They evenly shave away the wooden surface of the pencil using a sharp blade fixed firmly in the case. At STAEDTLER, we offer robust metal and plastic sharpeners for graphite and coloured pencils. These are suitable for normal-sized pencils as well as our extra-thick jumbo models. We use high quality blades in all of our sharpeners, so you will always enjoy optimum sharpening results.