Sunstar GUM Go-Betweens Proxabrush with 8 Refills (Tight)
From the manufacturer: "Clinically proven plaque removal with the Proxabrush Handle and Refill System. Handle has soft rubber grips for comfort and control, and a patented design to easily and securely load brushes. New triangular bristles are up to 25% more effective than conventional round bristles. Additionally, antibacterial bristles keep brush free of germs."[Disclaimer: Bristles incorporate an antibacterial agent for continuous bristle protection.  Bacterial growth that may affect the bristles is inhibited.  The agent in the bristles does not protect against disease.]