I don't think it's precise to classify it as an eye liner brush since the shape of the brush is more like a pin point. Perhaps it's better to call it as a small smudge brush. It can help apply color pigmented and on precise spot, and it's also very good to control. I'm really surprised when I used it for the first time. I will recommend it if you don't have such type of brush.
Ksz-06(KK-5) Eye Liner Brush / KOYUDO Kakishibuzome Series / Goat Saikoho(Kakishibuzome) Customer Reviews
Makeup Brush
This brush is so aesthetically pleasing. The natural wood handle feels very smooth in my hand. I love touching and holding the handle. I also love the way the wood grain shows through subtly in a slightly warm color. The saikoho hair is very soft yet firm. This is my first time trying a Koyudo brush. (I also bought a fu-pa with imitation hair.) I am excited and happy with the craftsmanship.
It's a very soft bullet brush. It does not irritate even when used on the lash line, and the color development is good. The natural dyeing and organic handle are pretty.
Koyudo makes some of the best goat hair pencil brushes. They're firm, in a way only goat hair can be, but they're not pokey or scratchy. This particular brush is in-between the size of the Yoshiki Y-5 and Y-4. It's the same length as the Y-5, but it's thicker and more robust like he Y-4. The gradient is more subtle on this small brush, but still apparent.
Great pencil brush for detailed eye work. I love it for inner corner highlight and the lash line. Exceeded my expectations for softness and I would highly recommend it to anyone looking for a pencil brush

