This lift features a high strength cable system with horizontal cables that are "hidden" inside the cross tubes. Professional grade wheel covers are used to eliminate almost all exposure of cables and double lock system. The high strength cable system is powered by a 110 volt (single phase) power unit to raise and lower the lift. Many competitors use an "old style" chain lifting system with an exposed hydraulic cylinder system. Old style chain lifts are difficult to "level" properly and the exposed hydraulic cylinder is responsible for numerous "door dings".