From the manufacturer:
Blue Squirrel – Grey Handle
“If you use scroll striping, you’ll love this brush! After 30 years of scrolling we’ve developed what I think is the finest brush available for this style. It gives beautiful controlled lines that respond exactly to your movements without the slightest hesitation, splitting or fraying in the turns. It holds its line throughout the pattern and gives you more response – like the most expensive brushes used for scrolling. I recommend this for beginners as well as seasoned veterans of this style.”
Good feeling Brush, doesn't blowout or flare, holds enough paint, must have.
This works for adding very fine detail work. Its also good for fine pinstripes.