Grout Cleaner BrushSTIFF BRISTLES BRUSH: This brush has ultra fine bristles that are much harder than toothbrushes, which can easily remove dirt and grime in the narrowest crevices, making your home cleaner and more hygienic. MULTI PURPOSE CLEANING BRUSH: Whether it's the kitchen sink, bathroom basin, or the crevices around the toilet lid, no matter what kind of dirt needs to be removed, the groove cleaning brush is suitable for any application. COMFORT HANDLE: Thanks