Air Chipping Hammer, Stroke Length 2 1/2 in, Air Inlet Size 7/8 in NPT, Blows per Minute 2,150 bpm, Shank Size 0.68 in, Air Inlet Type NPT, Air Inlet Connection Size 7/8 in, Compatible Collar Shape Oval, Power Source Air Powered, Air Consumption 31 cfm, Air Pressure 90 psi, Min. Hose Size 3/8 in, Lock-On Switch Yes