When it comes to oil brushes, quality is paramount. The hair of the kolinsky, often called "red sable," is ideal for a painter's brush. Kolinsky hair from Russia is known for its slender shape, but also its strength. Da Vinci mastered the art of brush-making and demonstrates it through the 1620 series. These brushes feature a fine tip that is excellent for enhancing details, precise painting and maximum control. The hair of the brush carries color well and allows for the subtle layering and blending necessary for oil painting. To provide ultimate durability, hair is glued into a brass, nickel-plated ferrule, attached to a polished handle.