Brush by Sigma. The P86 Angled Precision™ features a small, dense and tapered brush head. Made with exclusive Sigmax® fibers, this brush was designed to mimic your fingertips and great for applying concealer to rounded areas of the face such as the nose without any absorption of product. Unique Feature: Small, dense and tapered head. Function: Precise concealer application. Recommended Use: Exact placement of concealer on harder to reach areas such as around the eyes and nose, chin, and around the mouth.