It allows you to smoothly apply it to the outer corners of your eyes. I'm grateful that I can draw a clear, thin line easily even when I need to touch up my makeup. With the eyeliner I used before, even when I wanted to redraw the parts that had disappeared while I was out, I couldn't apply it like I did in the morning because of wrinkles. I use this eyeliner carefully, only on the parts where I want a thin line. After applying it, it will last longer and be less likely to smudge if you leave it as it is rather than blending it with a small brush.