Rubbermaid Commercial Tile and Grout Brush, Plastic Bristles, Black. The brush can be used for cleaning tiles and grout lines for those who want to make getting to those hard-to-reach spots easier. A hole near the end of the handle allows the brush to be hung for storage. The brush can be used for cleaning tiles and grout lines for those who want to make getting to those hard-to-reach spots easier. The plastic structural foam block and handle won’t crack or warp and resist bacteria growth. 8 1/2-inch length. The bristles are 3/4-inch long. Made in the USA.