4-1 Deep Clean Brush Set: - Each tile grout cleaning brush set comes with 4 brushes for different purposes. All of our brushes are made of high quality ABS plastic with non-staining polypropylene handles and bristles. Please rest assured to use and enjoy the most comfortable home life! UNIQUE HOUSEHOLD BRUSH: - (flat brush) for grouting, grouting tiles, cleaning bathtubs, floors or laundry rooms (curved brush) for shower headers, sinks, hobs, dials and other small spaces or crevices. While the (double-ended brush) is expert in all the places you want to clean, the different colors on the ends help you distinguish dirty places. Ergonomically designed brushes: - Each brush features an extended design with a non-slip curved handle that fits perfectly in your hand for powerful operations. The handle is comfortable and you can apply plenty of downward pressure on the brush without it slipping in your hand. ESSENTIAL MULTI-PURPOSE CLEANING TOOL: - Ideal for bathtubs, tiled walls, countertops and floors. Stiff bristles easily remove mildew, dirt and soap scum to help achieve your home's deep cleaning goals. Application: - Brush your joints with our joint washer. Your natural stone tiles and coverings will remain free of bacteria and mould. The bristles are very stiff and perfect for grout lines. The bristles are very stiff and perfect for grout lines. The bristles are very stiff and perfect for grout lines.