Angled Nutrunner, Lever Start,Twsit Ring Reverse, Clecomatic Clutch, 1/2" Square Drive ,1/2" Bolt Size, 220 RPM, 36-80 ft.-lbs. Air Inlet 1/2" NPT, Tool performance rated at 90 psi air pressure. Maximum torque of tool exceeds the maximum torque rating for the Head, high maintenance should be expected when operated at the upper torque capacity range.