Air Chipping Hammer Stroke Length 1 3/4 in Air Inlet Size 3/8 in NPT Blows per Minute 2 800 bpm Shank Size 0.68 in Air Inlet Type NPT Air Inlet Connection Size 3/8 in Compatible Collar Shape Oval Power Source Air Powered Air Consumption 23 cfm Air Pressure 90 psi Min Hose Size 3/8 in Lock-On Switch Yes