Anti-retraction system and single spray systemAir Pressure:180-250KPa(1.8-2.5kgf/cm2)Water Spray:198KPa(2kg)Rotation Speed:37,000~420,000rpmBur Applicable: Φ1.59mm~1.6mm *21mm~23mmHead High:13.14mm Head Diametre:11.2mmNoise:<=70dB