The purpose of the brush is to paint multiple lines in just one stroke.
The Fan-Dango® makes natural looking lines that vary in width. When you look closely at the Fan-dango® hairs you will see there are short hairs between the long hairs. This helps to hold more fluid paint and make longer strokes. The shorter hairs have very fine points just like the longer hairs. They are not just chopped off with blunt ends. The fine points help to produce fine lines with little or no effort.