A paintbrush 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. Paintbrushes come in various shapes and sizes, allowing artists and painters to create different effects and details in their work. The bristles of a paintbrush 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 fine lines and details. Paintbrushes are commonly used in art, home improvement, and crafts, making them versatile tools for creativity.