For those who like a fine line with an inkier flow than a ballpoint, there's Dude. The metal barrel of this Japanese rollerball gives it a little bit more heft for balance while the 0.5mm point gives your writing precision. The cap has a clip and can post on the end of the pen.
Measures 5 1/2" long, 1/2" wide capped. Hexagonal body with rounded matte plastic grip. Metal cartridge with ceramic ball. Gray imprint on the cap. Made in Japan.