Automated operation. One pull of the trigger sets and unthreads the tool from rivet nuts up to M12 and 1/2" Includes 10 mandrels / nosepieces in the following sizes: M5, M6, M8, M10, M12, 10-24, 1/4", 5/16", 3/8", 1/2" Simple mandrel thread size changes, push back spring loaded roll pin hex retainer under nose cover to unlock and unthread mandrels by hand 4270 lbs of instant air-hydraulic pulling force Up to 7mm of adjustable stroke length, set by rotating the rear drum to your desired stroke setting. Thread on rivet nut by hand, set rivet nut and remove tool from work-piece with single trigger pullview less