With these things I worked fifty years ago. They are practical and do not break off, as opposed to the small miners. Me does not hurt that you have to sharpen the mines occasionally. Power to halt a stinkin 'creative break. There are also small inenspitzer with envelope, so that the graphite lubricates not around. My recommendation to buy. Incidentally write pencils always unlike pens that dry out when not in use. Therefore, next to my phone is always this beautiful TK pin from Faber Castell.