The Oral-B iO Ultimate Cleaning Attachable Brush removes up to 100% more plaque than a conventional manual toothbrush for Oral-B's cleaning. The iO toothbrush's revolutionary magnetic technology delivers energy with pinpoint accuracy to the bristle tips. The twisted-in bristles fit perfectly to each tooth, while the 'bristle-in-bristle' bundles reach deep into the spaces between teeth. The iO attachment brushes are only compatible with Oral-B iO electric toothbrushes.