Suitable for drawing circles of radius R=1-15mm to minute detail, a spring regulator (white) attached at side smoothly sets the radius for ink/pencil mode. While centre-pointer is pinned on paper tool effortlessly slides up/down and revolves allowing for intermittent arcs and/or concentric circles to be drawn (pic).
Marvelous device, for technical dwg/industrial/graphic design students and pros, lifetime quality gear.
Postage: First class air-mail GBP 5.-