Pentel's #1 selling mechanical pencil. Superior construction meets the rigorous demands of professionals and students alike 4mm tip design makes it ideal for use with rulers and templates. Pentel Super Hi-Polymer HB lead is equivalent to a #2 pencil, guaranteed to scan on tests, resists breaking and never needs sharpening. Refillable with Super Hi-Polymer® Lead and Z2-1 refill eraser.