I spotted five metallic pens made by Bic in the shop today. So on a whim I bought them. I have to say I was impressed! They have large felt pen nibs and the ink flows well. The lines you can draw are a good weight and if you tip them on their side you get wider lines because they have a bevelled edge. The colours are strong and they seem to work well on my black cartridge paper sketch pad, they are nice and opaque. I will see how they work on white paper next.