Sharp pen "Advance" which can write clearer characters, evolved the mechanical pencil "Kurutoga" whose core point rotates automatically. It appears in Stitch's design.
Even if you continue writing, the density and thickness of letters do not change, you can write beautiful letters "Advance". Even if you write a lot of letters, letters can not be crushed, you can write clearly so you can make beautiful notes. It is a mechanical pencil that you want me to use for you who are writing a lot of characters everyday by work or study.