Paper Mate 66000 Clickster Grip Refillable Mechanical Pencils, 0.5 mm, Smoke Gray, 12-Pack The Clickster's click-advance button is conveniently located on the side, rather than the end like other pencils, do it's easier to advance the lead without releasing your hold of the pencil Strong lead creates bold lines and erases cleanly. Treaded grip makes it easy to hold and maneuver. Transparent window so you can monitor lead supply. Perfect for long writing tasks, or when you need to write without interruption. Vinyl eraser helps prevent smudging. Replace worn eraser with 64881 eraser refill. Includes 12 refillable mechanical pencils with 0.5 mm leads. Smoke gray barrel accents.