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