Intelligent pencil

Intelligent pencil ?? Five pencils? Three pen holders? 36 pencil leads? ?? Principle of automatic core-out: the core of the patent is in the position of the pen. When the pen touches the paper, it will automatically core-out. ?? Three no's: no cuts? Don't press? Never break? ?? The smart pencil king, the world's best pencil? ?? No cutting, no pressing, no writing, no pressing? ?? Seventh generation green non-toxic smart pencil? ?? Buy a set of children can use for a semester? 15381757965 WeChat