The EZ Loader automatically keeps the top of a load at a convenient working height. It handles weight capacities from 250 lbs. up to 4,000 lbs. The captive air system eliminates the need for mechanical springs. An EZ Adjust knob allows for three weight load adjustments without changing air pressure. The rotator ring minimizes walking and reaching during the loading process. EZ Loaders arrive at your facility fully assembled - just add air.