Clickster 0.5mm Mechanical Pencils, Assorted Barrels, 12-Pack Write uninterrupted thanks to an innovative side advance mechanism positioned right at your fingertips. Slim, stylish design features a transparent window so you can monitor lead supply. Strong pocket clip keeps pencil in handy reach at all times. Vinyl eraser helps prevent smudging. Assorted barrel colors: red, blue, green, and smoke.