This is part of the Core Collection set and is not available individually.
Detailer Brush is a teeny, tiny firm, flat brush with a tapered edge. The brush head is 9mm in length, 6mm in width, and 3mm in thickness. The whole brush is just under 5.5 inches/14 centimeters. If you have small eyes or deeper crevices around your nose, it might be more useful than your traditional concealer or lip brush as it is much shorter and thinner. This brush was scratchy/rough; when I would pat it underneath the eye for concealer, I could feel a few bristles “stabbing” the skin.