Normally, handpieces used for finishing ceramic materials (especially dental zirconia) are air turbines capable of operating above 100,000rpm. Unlike these, the Mestra Extreme handpiece doesn't use pressurised air to operate: Instead it is a powerful brushless electric micromotor, with an adjustable speed between 5,000 and 150,000rpm. Replacing air with electricity has a number of substantial advantages: The torque, especially at start-up and also at low revs, is much higher than that delivered by pressurised air • Allows a much smoother and more precise speed regulation • The reliability of electric turbines is much higher • The rotation is more regular and continuous • Overall, a better user experience both for use and quality of the work. The Extreme's high speed turbine has integrated LED lighting and a water irrigation system. A conventional brushless handpiece is also available, with rotational speed up to 50,000 rpm (not included in the set; see EM100355-02), which can work together with the electric turbine, both sharing the same control unit. Therefore, the technician can choose between a turbine and a micromotor, providing the set with great versatility. Unit dimensions: Height 285 mm. Width 115mm. Depth 220mm. Weight 3.7kg. Power 80W. Power supply 100-120/220-240V, 50/60 Hz. Turbine dimensions: Height 25mm. Width 25mm. Depth 140mm. Power 80W. Max Speed 150,000rpm. Torque 4.0 (N·cm).