Air Hammer Duty Heavy Duty Shank Shape Round Stroke Length 4 in Air Inlet Size 7/8 in NPT Female Kit Contents (1) Bare Tool Blows per Minute 1 600 bpm Shank Size 0.68 in Air Inlet Gender Female Air Inlet Type NPT Air Inlet Connection Size 7/8 in Compatible Collar Shape Oval Retainer Type Lock-Spring Power Source Air Powered Air Consumption 34 cfm Air Pressure 90 psi Min Hose Size 1 in Material Application Concrete Metal