Challenger's 7,500 lb. capacity rolling jack features air/hydraulic operation for 4P14 series 4-post automotive lifts. Broaden your service revenue with easy access to brakes and wheels from underneath four post lifts. 7,500 lb. capacity rolling jacks features adjustable width, low-vehicle drive-over clearance, stackable height extensions with built-in storage rack and factory installed and protected filter lubricator and regular.