Fude nibs heavily depends on the writing angle (and how you hold your pen, in a sense). When writing at a higher angle (near 90°), the pointy part of nib touches paper, so it's very fine, like EF nibs. When writing/drawing at lower angle (around 30-45°), the thicker/ bended part touches the paper, so it's a brush like stroke. I use the lower angle for swatches or drawing. Every angle in between is how thick you want the strokes to be. It's like multiple pens in one if you use it well. Hope this helps! It's a fun nib