da Vinci Graphic Design Series 709 Pinstriping Brush, Dagger-Shaped Kazan Squirrel Hair with Black Handle, Size 0 The ultimate pin striper. da vinci long handled series 709 features pure kazan squirrel hair, the finest available for striping brushes. The hair is set in highest quality nickel plated brass ferrules. it will retain its shape over time. Brush will hold its shape flawlessly for long, clean lines that are unprecedented. For free-hand lining and pin-striping, it derives its name from the fact that the hair setting resembles a dagger or sword. This brush was used often by willem de kooning with thinned down oil paint.