Product ID: 4094 Boar's Hair Black Detail Brush - Small Features: Ergonomically designed handle profile Textured grip area Balanced at grip area to minimize user fatigue Chemical resistant handle and boar hair bristle materials Metal free construction to prevent scratching About ...Product ID: 4094 Boar's Hair Black Detail Brush - Small Features: Ergonomically designed handle profile Textured grip area Balanced at grip area to minimize user fatigue Chemical resistant handle and boar hair bristle materials Metal free construction to prevent scratching About These brushes are best for cleaning engine bays, brake calipers, exhaust tips, wheels, and any other surface or vehicle that needs heavier cleaning action. The large size is ideal for wheel faces and inside engine bays, while the small size is best for exhaust tips, lug nuts, and other compact areas of the vehicle. The stiffer boar hair also makes these great for scrubbing textured interior plastics.