An eyeliner brush that serves your eyeliner, of course. To use, dip the brush into the eyeliner pot, Starting from your inner eye, draw a line outward, gradually increasing the width of the line and flicking out toward the ends.
Pro Tip: Sometimes, a selfie after applying your liner is a good idea to check the similarity of your wings.
Many types of makeup brushes are multi-use, so don’t be afraid to use this brush for other reasons than the ones mentioned above.