Uni-ball Alpha-gel Shaker Mechanical Pencil -Yellow Green - Soft Grip 0.5mm- (M5617gg1p.5) & Diamond Infused Leads [Nano Dia-40 Leads] Value Set(with Values Japan Original Discription of Goods) Grip - soft and flexible alpha-gel (Soft cushion grip) Shake it to extend the lead. Can Lock the lead when you are not using It is smooth and they are a spare lead which cannot break easily, and the profitable set which attached Nano Daia (hot product of Uni) together.(HB 40 Leads)