Ad. DORIT Dental Highspeed Handpiece Air Turbine 2/4 Holes Single Spray Standard/Torque Head 10 Pcs/Pack Dental Handpiece Features: 1.Lost cost, high cost performance. handpiece 2. Single spray, accurately spray cooling water to the high-speed cutting parts for good cooling effect 3. Push button type to change bur, easy and convenient 4.