Double column type classification

Double-column lifts have symmetric and non-symmetric in two ways. Symmetrical four-arm lift arm's length roughly equal, which makes automotive Centre (or Center) is in the middle of the column position, for pick-up trucks and box-type trucks and other types of cars for routine maintenance of the symmetrical lift may be the best choice. But for some column width large enough symmetry between two-post lift, auto lift doors cannot be opened after a major shortcoming. Asymmetric lift columns rotated at an angle backwards (about 30 degrees), slightly shorter than the rear arm and forearm. When you leave your car to the non-symmetrical lifting position, position is moved backward