The Pentel Quicker Clicker is the original side advance Mechanical Pencil. It features a convenient side button that propels lead for continuous writing without changing writing position. A protective tip design stabilizes lead to reduce breakage and help your lead last longer. A comfortable, extra-soft latex-free grip reduces writing fatigue. Eraser cap to keep your eraser clean when not in use. Available in 0.5mm, 0.7mm and 0.9mm lead sizes; it is pre-loaded with Pentel super Hi-Polymer HB lead that never needs sharpening, is super strong and produces a clear dark line. The Pencil is backed by pentel's limited lifetime warranty.