The Artline Drawing System pens are, unsurprisingly, drawing pens. They use water-based yet water-proof black pigment ink and can be found with tip sizes from 0.1 to 0.8.
The ink is good and black and the clip is nice and strong. Those are the best aspects of this pen. The line isn’t always consistent – the width wavers thin and thick now and again. The ink can also turn a little glossy when shading in, instead of remaining a consistent matt.
It looks as if the cap ought to post and so it should. It’s important for the cap to post securely on a drawing pen because they’re often going to be used out and about and you need to put that cap somewhere safe, like the end of the pen. But it just falls off. It doesn’t post at all.
Here’s a drawing I did with the Artline Drawing System 0.2.
Here is a pen box my daughter made for me, that is a perfect fit for a less than perfect pen.
The Sakura Pigma Micron is a much better pen and costs less. The Copic Multiliner is also a much better pen and in the disposable incarnation also costs less. There’s no reason I can see to buy an Artline Drawing System pen instead of one of those.