-High speed handpiece: 1way spray. -Chuck type: push button/latch. -Noise: ≤68dB. -Bur applicable: Ø1.59-Ø1.6mmx21-23mm. -Rotation speed: ≥300,000rpm. -High speed handpiece 45 degree angle for impacted tooth. -German dynamic balance Imported bearing, long life, low noise and stable.