Hand scrub brushes are typically made from a combination of materials designed to provide durability, comfort, and effective cleaning. The main components include:
1. **Bristles**: 
   - **Natural Fibers**: These include materials like boar hair, horsehair, or plant-based fibers such as tampico (derived from the agave plant). Natural fibers are often softer and more flexible, making them suitable for delicate surfaces.
   - **Synthetic Fibers**: Commonly made from nylon, polyester, or polypropylene. These materials are durable, resistant to chemicals, and can be manufactured in various stiffness levels to suit different cleaning tasks.
2. **Handles**:
   - **Wood**: Traditional scrub brushes often feature wooden handles, typically made from hardwoods like beech, oak, or bamboo. Wood provides a sturdy grip and a classic aesthetic.
   - **Plastic**: Modern scrub brushes frequently use plastic handles, which are lightweight, resistant to water and chemicals, and can be molded into ergonomic shapes for comfort.
   - **Metal**: Less common, but some heavy-duty scrub brushes may have metal handles, often made from stainless steel or aluminum for added strength and durability.
3. **Backing/Base**:
   - **Wood**: Similar to handles, wooden bases are durable and provide a natural look.
   - **Plastic**: Offers water resistance and can be easily cleaned, making it a popular choice for the base of the brush.
4. **Additional Features**:
   - Some scrub brushes may include rubber grips or padding on the handle for enhanced comfort and control during use.
   - Certain designs incorporate a scraper edge, often made from plastic or metal, for tackling tough grime.
These materials are selected based on the intended use of the brush, balancing factors like durability, cost, and the specific cleaning requirements.