Air Chipping Hammer Stroke Length 2 1/2 in Air Inlet Size 7/8 in NPT Blows per Minute 2 150 bpm Shank Size 0.58 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