For cleaning and removing surface dust, weld slag, or paint. Adjustable bayonet-type needle housing lock allows adjustment without special tools. Precision heat-treated needles for maximum performance. Come with 5 different shape 175mm-long H.D. chisels and 1pc spring. Features: Blows per minute: 5,000 BPM; Air inlet: 1/4" NPT; AVG Air Consumption: 4.5 CFM (85 L/min); Air Working Pressure: 90PSI (6.3 kgs/cm2); Air Exhaust: Front; Needles: 19 needles (3mm Dia.); Overall Length (Scaler): 15 inches (380 mm); Overall High: 6-1/4 inches; Overall width: 2 inches; Net Weight (Scaler): 5.5 LBS; Total Weight: 8 LBS. Include: 1pc--------15in 19 needles Pistol Air Scaler 5pc-------Chisel bits, 175mm-long 1pc-------Spring 1pc-------L wrench 1pc-------Nipper 1pc-------Instructions