Extremely stable lift system can easily lift up to 750 lbs from 20" wheelchair height to 30"H. Hydraulic cylinders are built into each four corner steel legs. Motorized power height adjustment. Hands-free foot control operation. Seamless nylon-reinforced vinyl is tear resistant. 2" high-density urethane foam top. Steel frame is durable black powder coated finish. Legs have levelers for uneven floors.