Cross Action replacement toothbrush heads Precisely angled bristles are set at 16 degrees to reach deep between teeth and remove up to 100% more plaque vs. a regular manual toothbrush. Tooth-by-tooth cleaning for superior plaque removal vs. a regular manual toothbrush. They remove twice as much plaque as an ordinary manual toothbrush and come with dentist recommended oscillate and rotate technology for maximum cleaning. These brush heads are interchangeable with all Oral-B handles (excluding Pulsonic/Sonic).