The Uni Style Fit Multi-Pen takes the Uniball Signo DX ink refill and puts it into a multi-pen barrel that holds three of your favorite colors. The refills come in a wide variety of shades, and mine is filled with Brown-Black, Mandarin Orange, and a very bright Green all with a 0.38mm tip. Some of the multi-pen barrels have clips, others, like this purple one, do not.
To my eye the pen design isn't particularly stylish, but that may be a combination of the purple color (which isn't as blue as this picture makes it out to be), the "fins" at the end of the barrel, and the clear grip which allows you to see the ink refills but also makes the pen seem...cheap isn't quite the word I'm looking for but perhaps "lesser goods" might be the best way to put it. Which is interesting because the gel ink refills write smoothly and very crisply. This pic isn't the best quality, but the actual writing is very clear, even the green which is paler on the paper than in the pen. It's not a bad multi-pen at all, and I'm thinking of getting a different barrel. What really caught my eye was the Brown-Black ink refill, a different color that I wanted to try and find I like.