Pneumatic Nut Runner Drive Size 1/4 In. Torque Range Soft Draw 0 to 102.3 in.-lb. Direct Drive Drive System Free Speed 500 rpm 16 CFM @ Full Load Required Pressure 90 psi Air Inlet 1/4 in NPT Min Hose Size 1/4 In. Throttle Lever 8-15/16 in Overall Length Head Width 0.52 In. Base to Top 1-11/32 In.