-Our Floor Scrub Brush is designed in V-shape Stiff Bristles, it is special for cleaning those hard-to reach corners, cross grout, gaps and crevices in bathroom and kitchen. The SMALL & THIN Tile grout brush fits easily to the grout lines(corners, tight spots, etc.), cross crevices, high and low gaps, corners, etc. and effectively remove the stains stubborn dirt, dirty water, and dust on the ground or wall without damage the wall.