Offers the same cutting efficiency as the TwinPower Turbine standard head. Ceramic bearings with convenient push-button chuck. Its double-impeller rotor design produces up to 22 watts of power. A pressurized air system prevents drawback in the air line, resulting in superior infection control. Unique rubber brake ring design stops the turbine within 2 seconds. Nonoptic, 4-hole connection. 1-year warranty.