Features: Small and lightweight, this needle scaler is strong and easy to work and durable. Applications: For removing rust and shells from marine and paint such as removing flux in welds, removing sand from casts. Specifications: Hose Inlet: Rc1/4; Air Consumption (cubic feet)/min): 0.18; Total Length: 8.7 inches (221 mm); Compatible Needle Dimensions: 0.1 x 7.1 inches (3 x 180 mm); No-load Blows (rpm): 7980; Specifications 2: Air Pressure: 0.63 MPa; Piston Diameter: 25 mm; Stroke: 0 mm