NSK type quick coupling is convenient to replace the handpiece after treatment, which can improve work efficiency.LED fiber optic lighting can provide high quality illumination to ensure the clear vision field, which is beneficial to increase the preparation precision control and reduce fatigue during treatment.Four water spray can accurately cool down the affected part from 4 angles, so that the teeth will not be affected by the heat generated during cutting to better protect the teeth.Airflow stabilization device keeps stable speed to provide constant-pressure airflow for the dental handpiece, reducing bearing damage caused by instantaneous high air pressure.Germany ceramic ball bearing creates low noise and longer service life.The medical grade stainless steel material 316L is drop-resistant, durable and unfading.