Beams using high strength H steel. Platform overall forming bearing up to 4.5 tons. Manual reset locking mechanism, long service life, safety and reliable, Adjustable bumper. As a 4 post wheel alignment lift manufacturer, each ouu wire rope fracture protective system, can effectively prevent the steel wire rope dorp fast when fracture. Yellow warning parts on the up ramp, at the same time of warning also protect the ground friction. Optional hydraulic secondary lifting trolley, bearing 10000 lbs, lifting height 1942mm,and has a trolley hose bracket on the column. There is throttle valve on the channel for oiling. Four columns secure level accurate adjustable. All moving parts are equipped with grease nipple, convenient filling lubricating oil.