Steelman Weld Flux Chipper and Needle Scaler with a 1" bore and 1-1/8" stroke operates at 4,600 blows per minute. This air-powered tool features heat-treated pistons and barrels for extended tool life, and nineteen (19) 1/8" needles are included. This product also features a 1/4" air inlet (for 3/8" hose) and runs on 90 PSI of air pressure, with an air consumption of 4 CFM, measuring 18" in overall length.