This package contains two Precision Clean replacement toothbrush heads with 29% more cleaning bristles than the previous Precision Clean toothbrush heads. They surround each tooth to give you a complete clean for cleaner teeth and healthier gums. They also remove up to 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).