Grout brush with stiff bristles gets into grout joints, edges, for ideal for cleaning narrow space and corners Made from pollution free of pp & pbt, not easy to fall off or twist, for a long service life cleaning brush cleans grout,, kitchen stove, door track, window track conveniently Come with ergonomic design, the curved handle of each brush can perfectly fit your hand that can allows you do a powerful action The small cleaning brush set is an effective crevice cleaning brush that ' s perfect as a lines brush