Pentel Quicker Clicker Automatic Pencil, 0.7mm, Transparent Blue Barrel, 2 Pack (PD347BP2-K6) The original side advance mechanical pencil; Convenient side button propels lead for continuous writing without changing hand position Brass clutch guarantees consistent lead advance every time; Transparent barrel allows user to monitor lead supply 0.7mm fine lines; soft, latex-free grip Refillable with Pentel Super Hi-Polymer Lead and PDE-1 large refill eraser