This is a KATO 202 mechanical pencil (0.5mm) made from Japanese Yew wood. It can be changed to a ballpoint pen (KATO 201). Gold hardware is available for an additional ¥1000, and black hardware for an additional ¥300. Japanese Yew is an evergreen broadleaf tree native to warm regions of Japan, known for its extremely hard and dense wood. It is resistant to insect damage and highly durable, making it an ideal material for writing instruments that will be used for a long time. Maximum diameter: 12.9mm Weight: 26g