The Pentel® PRIME™ mechanical pencils offer Pentel quality in an economy pencil. The built-in molded grip is grooved for greater comfort during extended writing periods. Each mechanical pencil is pre-loaded with Pentel® Super Hi-Polymer® "HB" lead, which never needs sharpening, is super strong and produces a clear dark line. PRIME pencils are available in a 0.7mm lead size, which writes medium lines. The long-lasting, latex-free eraser is refillable (Model PDE-1).