Air Hammer Kit Duty Medium Duty Shank Shape Round Stroke Length 3 1/2 in Air Inlet Size 1/4 in NPT Female Kit Contents (1) Bare Tool (4) Chisels (1) Retainer Blows per Minute 2 300 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 Power Source Air Powered Air Consumption 25 cfm Air Pressure 90 psi Min Hose Size 3/8 in Lock-On Switch Yes