Features: Comes with a spring that prevents chisel from falling out. Applications: For a wide range of applications such as thin concrete beams for civil engineering, construction, electrical work, stone grabs, metal sand-dropping, rust removal, etc. Specifications: Hose Inlet: Rc1/4; Air Consumption: 0.35; Total Length: 11.0 inches (281 mm); No-load Impacts (rpm): 3,200; Chisel Outlet Shape: Round; Number of Blows (min-1): 3,200; Recommended Hose Inner Diameter: 0.4 inches (9.5 mm); Air Pressure (kgf/cm2): 0.6 6) Specification 2: Air Pressure: 2-hammer type