PS4 - For all supragingival & interdental calculus.
ES1 - 120 degree Angle Holder for .08mm U files. For anterior roots.
ES2 - 95 degree Angle Holder for .08mm U files. For molar roots.
ES3D - After root canal cleaning, using the mechanism & heat energy of ultrasonic vibration to intenerate the filling lateral condensation, to make sure the top of the scaler tip touches the lateral condensation.