9 dBA Sound Level, Spring Retainer, 9.UT Pneumatic Aero Riveting Hammer, Type 5X, Bare Tool, 1/2 in Bore, 2000 bpm Blows per Minute, 3-7/8 in Stroke Length, 7 cfm Air Flow, 90 psi Air, 1/4 in Air Inlet, Trigger Throttle, 3/8 in Minimum Hose, Aluminum Housing Material, Ergonomic/Contoured Grip Handle, 98.4 in L Dimensions.