The floss action toothbrush heads provide a floss-like clean. The unique floss action bristles loosen plague in between teeth. The round toothbrush heads are inspired by dental professional tools for a tooth-by-tooth clean, with specially engineered bristles for optimal tooth coverage. Works with Oral-B Triumph, Oral-B Smart Series, Oral-B Pro, Oral-B Vitality (except vitality sonic) and Oral-B Pro Health Power. This product does not replace flossing.