Product features: Air Exhausted Throw at the Back of Handpiece to Prevent subcutaneous air bags Working air-pressure: 0.20Mpa-0.22Mpa (recommended 0.20Mpa) Speed : ≥280.000R.P.M Spray: single water spray Applicable bur: ∅1.595 -- ∅1.600mm Chucking power: 25-45N Noise level: <70 dB Net Weight: 65g Clamping means of bur: Push button 45 degrees nose, applied impacted tooth dentistry