Air Hammer, Duty Medium Duty, Shank Shape Round, Stroke Length 2 5/8 in, Air Inlet Size 1/4 in NPT Female, Kit Contents (1) Bare Tool, (1) Spring Retainer, Blows per Minute 3,200 bpm, Shank Size 0.401 in, Air Inlet Gender Female, Air Inlet Type NPT, Air Inlet Connection Size 1/4 ...Air Hammer, Duty Medium Duty, Shank Shape Round, Stroke Length 2 5/8 in, Air Inlet Size 1/4 in NPT Female, Kit Contents (1) Bare Tool, (1) Spring Retainer, Blows per Minute 3,200 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 Spring, Power Source Air Powered, Air Consumption 7 cfm, Air Pressure 90 psi, Exhaust Location Side, Min. Hose Size 3/8 in, Material Application Concrete, Steel