What is the purpose of the ferrule on a brush?

The ferrule on a brush plays a crucial role in holding the bristles in place, which is essential for the functionality and durability of the brush. It is typically made of metal or another sturdy material, and its design securely encases the ends of the bristles, preventing them from falling out during use. This ensures that the bristles remain intact and continue to perform effectively, allowing for consistent application of products such as nail polish or other cosmetic materials. A securely attached ferrule also contributes to the brush's lifespan, making it a vital component for maintaining quality in nail care tools.