Since its launch in 1986, the Graph 1000 Four Pro has been recognized for its quality and functional aesthetics, and is now available from the Graphs 1000 which is the choice of professionals worldwide. The unique writing experience of drawing mechanical pencil, promises a wide range of uses, from writing to sketching. This is a high quality mechanical pencil for those who want to write well and neatly. Compatible with sharp lead diameter 0.02 inch (0.5 mm)
(From Amazon.co.jp)