Pneumatic Stroke Riveting Hammer,3-5/8 In., Duty Heavy Duty, Stroke Length 3 1/2 in, Air Inlet Size 1/4 in NPT, Blows per Minute 2,000 bpm, Shank Size 0.401 in, Air Inlet Type NPT, Air Inlet Connection Size 1/4 in, Power Source Air Powered, Air Consumption 4 cfm, Air Pressure 90 psi, Min. Hose Size 3/8 in, Material Application Wood, Plastics, Metals, Accessory Free Tool Change Yes, Lock-On Switch Yes