This product is a Pilot Dr. Grip 0.5mm mechanical pencil. Brand: Pilot Series: Dr. Grip Lead Diameter: 0.5mm Features: Shake-to-Advance Lock function Color: Maroon or Deep Red It features an ergonomic grip and the "Fure Fure" (shake-to-advance) function that advances the lead with a shake. Used only for test writing. Stored at home. Please consider purchasing if you understand this.