Needle/Chisel Scaler Kit Industrial Duty 4000 Blows per Minute Stroke Length 1-1/16 In. Average CFM @ 15 Second Run Time 6.5 CFM @ Full Load 13.0 Required Pressure 90 psi Air Inlet 1/4 in NPT Min Hose Size 5/16 In. Overall Length 9 In. Straight Handle Type1/2 in Square Shank Needle Housing Lock Lever ThrottleIncludes Chisel/Needle Scaler No 3Y590 (38) 5 in Needles (19) 7 in Needles 6-1/8 in Angle Chisel 6-1/8 in Straight Chisel 7 in Flat Chisel Case