The Wooster 2-1/2" Silver Tip Varnish Brush is a professional-grade brush used to apply varnish and other coats with precision and smoothness. It's a member of Wooster's Silver Tip series, which is noted for its high-quality materials and performance. The brush's breadth is 2-1/2 inches, making it perfect for medium-sized tasks. The "Silver Tip" label most likely refers to the brush's fine, flagging filament tips, which contribute to a clean finish with minimum brush markings. Overall, it is a popular choice for painters and craftspeople seeking professional effects.