Brush by Sigma. The P84 Angled Precision™ features a small, dense and angled brush head. Made with exclusive Sigmax® fibers, this brush was designed mimic your fingertips and great for applying contour shades to apply to the hollows of the cheeks and sides of the nose without any absorption of product. Unique Feature: Small, dense and flat angled head. Function: Precise contouring. Recommended Use: Apply product to areas such as the sides of the nose and the hollows of the cheeks.