Air Hammer Duty Heavy Duty Shank Shape Round Stroke Length 3 in Air Inlet Size 1/4 in NPT Female Kit Contents (1) Bare Tool (1) Retainer Blows per Minute 2 100 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 Standard Beehive Power Source Air Powered Air Consumption 13 cfm Air Pressure 90 psi Min Hose Size 3/8 in Material Application Aluminum Dural and Soft Iron