This is a pencil with a replaceable and mechanically extendable core.
From Uni Mitsubishi comes this high quality 0.9mm Silver Mechanical Pencil. The Shift lock design not only looks amazing but also helps protect the pencil tip when storing it. With heavy users in mind the shift lock mechanism allows you to shift the head of the pen forward to encase and protect the nib. Simply rotate it left, shift it forward and then rotate left once more until you hear a click and hey presto, no more unnecessary lead breakages or nib damage. Also features a textured grip for stability and precision. Last but not least the low center of gravity and plastic upper body helps reduce hand fatigue. Another innivotive idea from Mitsubishi, order yours today!