Derwent Scale Divider
An ingenious drawing tool invaluable to artists of all levels.
Derwent Scale Divider makes it easy to transfer measurements from life, photographs and sketches to paper ensuring you achieve accurate proportions every time.
To increase the size of a subject, use the shorter end of the divider and compare or transfer with the larger end. To decrease the size, just reverse the instructions. A nut at the center of the piece adjusts the size of the scale based on your needs and secures to keep measurements intact until you record them.