Pentel is a pioneer of graphite lead research. More than four decades of relentless research and development have made our Super Hi-Polymer the no. 1 selling lead in the world for strength and smoothness. Even the harder grades (H, 2H, etc.) feel super smooth to write with. As lead gets 'blacker' it usually becomes weaker, but our innovative production methods combine to give dense, rich colour and fantastic resistance to breakage.