New Uni "Kurutoga Advance Upgrade Model" which has improved deseign and shafut materials, has appeared to "Kurutoga Advance" series, which allows you to write beautiful characters with the same darkness and thickness even if you continue to write for a long time. In recent years, students who are the main users of mechanical pencils are particular about performance, functions, design, etc. , and have a need to use something better and different. A product that meets such needs is the "Kurtga Advance Upgrade Model". High-precision metal punching grips provide a smooth grip. The double speed "Kurtoga Engine" and metal parts keep the core sharp at double speed, and the line width becomes even faster and narrower. Equipped with a core break prevention mechanism, which prevents core breaks and enables comfortable writing without worrying about writing pressure.