Graph Gear is part of the popular Mechanical Pencil Series of the well-reputated Pentel company. With its refined design and functionality the Graph Gear supports people across various business sectors on a daily basis. That pencil lead sizes range from as thin as 0.3, 0.5, 0.7, to 0.9, is a distinct feature. Among them, the standard size of 0.5 is the most popular.Without doubt, one of the most acclaimed Japanese stationery products out there.