The flat rounded edge is ideal for concealing, carving out the brows and cutting the crease for "cut-crease" eyeshadow looks. It can also be used to apply lip products and clean up the lip line with concealer.
This is my FAVORITE concealer brush. I wish I could have multiple for my kit! Have 2 & still need to get my hands on more of them for my bridal groups! The application of the concealer is so smooth with this brush!