This is a set of 5 felt tip pens from Free Hand that start at a very fine line and move up a bit with each pen. The finest is .05mm and this set also has, 0.2mm, 0.4mm, 0.6mm, and 0.8mm. When I first opened these I cleaned the pens as they had been setting for a while these should be kept right side up where you can read the numbers so that the ink doen't blead out. These are great for drawing, art, doodling and what ever other project you need a good pen for. These glide across the paper without skipping. I didn't notice any smudging or bleeding on the paper.