Beam using high strength rectangular tube with beautiful appearance. Platform overall molding, bearing up to 4 tons. Manual mechanical reset insurance mechanism. Safety, reliable and high efficiency synchronization. The cable fracture protective mechanism can effectively prevent the cable drop fast when fracture. Optional slide plate for four-wheel alignment. Optional hydraulic rolling jack, bearing 8000 lbs(4 tons),lifting height 1755mm, and there is hose bracket on the column. Yellow warning parts on the up ramp, at the same time of warning also protect the ground friction. Four columns secure level accurate adjustable. There is a throttle valve on the channel for oiling. All moving parts are equipped with grease nipple ,convenient to fill lubricating oil efficiency.