Tube expansion system, Our New Model Push & Pull K50-600 Pneumatic Rolling Motor has been specifically engineered to ensure uniform tube to tube sheet expansions, thereby preventing the under and over rolling of tubes. This pneumatic tool features an aluminum body, weighing in at only 10.5 lbs (4.76 Kgs) with an ergonomically correct pushpull Throttle. Automatically Stops Tube expansion at defined settings.