Air Hammer, Duty Heavy Duty, Shank Shape Round, Stroke Length 3 1/2 in, Air Inlet Size 1/4 in NPT Female, Kit Contents (1) Bare Tool, (1) Spring Retainer, Blows per Minute 2,100 bpm, Shank Size 0.401 in, Air Inlet Gender Female, Air Inlet Type NPT, Air...