A paint brush is a tool used for applying paint, ink, or other substances to a surface. It typically consists of a handle and bristles, which can be made from natural or synthetic materials. Paint brushes come in various shapes and sizes, allowing artists and decorators to create different effects and cover areas efficiently. The bristles of a paint brush can be flat, round, or angled, each serving a specific purpose. For example, a flat brush is ideal for broad strokes, while a round brush is better for detailed work. Proper care and cleaning of a paint brush are essential to maintain its performance and longevity.