Air Hammer Duty Heavy Duty Shank Shape Round Stroke Length 2 1/4 in Air Inlet Size 1/4 in NPT Female Kit Contents (1) Bare Tool Blows per Minute 3 000 bpm Shank Size 0.401 in Air Inlet Gender Female Air Inlet Type NPT Air Inlet Connection Size 1/4 in Compatible Collar Shape Round Retainer Type Chisel Power Source Air Powered Air Consumption 15 cfm Air Pressure 90 psi Min Hose Size 3/8 in Material Application Concrete