This is a Kuru Toga mechanical pencil that uses Swarovski crystals. I received it as a gift, but I don't use it, so I'm offering it to someone else. The lead size is 0.5mm. Advance It seems to be sold on Amazon for around 2400 yen. With its high functionality and Swarovski crystals, this noble and stylish stationery is something that will bring satisfaction not only when you use it, but also just by owning it.