Air Chipping Hammer, Stroke Length 1 in, Air Inlet Size 3/8 in NPT, Blows per Minute 2,750 bpm, Shank Size 0.58 in, Air Inlet Type NPT, Air Inlet Connection Size 3/8 in, Compatible Collar Shape Oval, Power Source Air Powered, Air Consumption 28 cfm, Air Pressure 90 psi, Min. Hose Size 3/8 in, Lock-On Switch Yes