SATISFACTION GUARANTEED – 100% Satisfaction Guaranteed, Or Your Money Back. FOR YOUR CONVENIENCE – Compatible With ALL Rechargeable Handles, Except Sonic Toothbrushes and all alkaline battery powered brushes (that use ONE AA battery) (see a full list of compatible models in the description below). PREVENTS CAVITIES – Side-To-Side Bristles Sweep Away Plaque While The Moving Power Tip Penetrates Hard To Reach Areas And Stationary Bristles Polish Tooth Surfaces. SENSITIVE TO YOUR NEEDS – Soft Bristles To Protect YOUR Teeth From Harmful Harsh Brushing And A Comfortable Clean With These 8 Brushes!. PROFESSIONAL CLEANING EVERY DAY – Generic Precision Clean Toothbrush Replacement Heads Design Is Inspired By The Superior Cleaning Power Of Professional Dental Tools.