The Vitrex Grout Brush is designed to remove unwanted build up from tiles and grout lines. It features nylon bristles that work on all grout joint widths and a comfortable handle with a thumb rest to improve leverage and reduce fatigue. On the opposite side of the bristles, a square edge can be used for scraping when you turn the brush over. This brush performs great on grout and tile and hard surfaces like concrete. Multipurpose, it can be used for cleaning jobs at home, patio, garage, car, camper, boat, motorcycle or trailer.