Da Vinci's Maestro designation is reserved for brushes manufactured using male winter Siberian Kolinsky Red Sable fur. These are top-of-the-line brushes. The extra sharp needle-like point and longer tapered hair length result in faster action at the tip.
Series 5506, Retouch — A retouch brush is a pointed round kolinsky that has a shorter tip than a standard kolinsky sable round.
® Da Vinci is a registered trademark of Da Vinci Brushes.