There are many types of writer available, we stock a few of them.
The Swami (Nail Writer) is the most common and these are supplied in a pack of 4 with a booklet of ideas and uses.
The Boon (invented by Eric Mason) is another common writer, it adheres to the pad of the thumb and is easily hidden.
The Bug writer is a slightly larger version of the Boon (giving more grip to the thumb).
The Thumb Tip Writer is the top part of a thumb tip with a writer embedded into it.
The Boon, Bug & Thumb tip types come with either pencil lead or grease writers