Needle and Chisel Scaler Kit Body Style - Air Tools In-Line Duty Cycle - Air Tools General Duty Stroke Length 1 13/64 in Blows per Minute - Air Tools 4 800 Air Inlet Size - Air Tools 1/4 in NPT Average CFM @ 15 Second Run Time 1.0 CFM @ Full Load 4.0 Required Pressure 90 psi Min Hose Size 3/8 in Overall Length 18 in Shank 1/2 in Square Housing Lock Needle Throttle Lever Standards ISO-28927-9 For Use With Chisels Needles Includes 1 3/8 in Wide Chisel (19) 1/8 in Steel Needles