This is PILOT's high-end mechanical pencil, the "S30." It features an automatic lead advance mechanism, eliminating the need to click while writing. ・Almost unused (only tested) ・No noticeable scratches or stains ・Lead diameter: 0.5mm With its simple and sophisticated design, it can be used by a wide range of people, from students to working adults. Instant purchase is welcome. Please comment if you have any questions.