The Wooster 2-1/2" Ultra Pro Soft Angle Sash Brush is a high-quality paintbrush that is intended for precision and simplicity of use. Its slanted form allows for precise cutting-in around edges and corners, making it great for painting trim, windows, and other intricate details. The "Ultra Pro Soft" classification indicates that it contains finely pointed, synthetic bristles that allow smooth application and excellent control while yet holding a sufficient amount of paint for effective coverage. Wooster is well-known for manufacturing professional-grade painting tools, thus this brush should last and work well. It is a popular choice for both DIY enthusiasts and professional painters.