Uni Kuru Toga Roulette Model Auto Lead Rotation Mechanical Pencil 0.5 Mm - Gun Metallic Body (M5-10171P.43) with the Spare 20 Leads Only for Kuru Toga & Pencil Eraser for Kuru Toga set Twist and turn mechanism rotates lead as you write to keep lead sharp 20 lead & 5 Pencil Eraser only for Kurutoga is attached. (Uni is the lead developed for Kurutoga) Engineered to resist breakage The center of a lead is hard and the outside is made softly Therefore, it can write in the more sharp state 0.5mm point lead for more precise writing