Uni-ball Kuru Toga High Grade Auto Lead Rotation Mechanical Pencil 0.5 Mm - Black Body /With the Spare 20 Leads Only for Kuru Toga Value Set(with Values Japan Original Description of Goods) Twist and turn mechanism rotates lead as you write to keep lead sharp Engineered to resist breakage 0.5mm point lead for more precise writing "The lead only for Kurutoga is attached. (Uni is the lead developed for Kurutoga) The center of a lead is hard and the outside is made softly Therefore, it can write in the more sharp state