Earth-Friendly Cleaning Tools. Tough Bristles for Grout Softer Bristles for Tile. Renewable Bamboo and Recycled Plastic. Hangs for Convenient Storage. Stands on End for Quick Drying. Recycled Material. Come Clean. Full Circle. A little effort goes a long long way with our iron-shaped grout brush designed to make one of the most unpleasant household chores a whole lot easier. The outer softer bristles clean tile while the tough narrow middle bristles do a killer job on grout.