Pencil Drawing By Paul Lung

Also known as a steno pencil. These pencils are expected to be very reliable, and their lead is break proof. Nevertheless sometimes steno pencils are sharpened at both ends to enhance reliability. They are round to avoid pressure pain during long texts.
Golf pencil
Golf pencils are usually short (a common length is 9 cm) and very cheap. They are also known as library pencils, as many libraries offer them as disposable, unspillable writing instruments.