"These four-post bridge jacks are the perfect accessory for your BendPak four-post lift. The bridge jacks are used to raise the front or rear portion of a vehicle off the runways allowing operators to perform efficient wheel and brake service. A pair of jacks allows the entire vehicle to elevated. Each jack has telescoping arms and frame contact pads that can be extended over the runways and positioned under vehicle lifting points. Telescoping rail supports accommodate adjustable runways for different tread widths. Each jack features three safety-lock positions and stackable truck and van adapters for increased lifting height and better access to frame contact points on high ground-clearance vehicles. The jacks come equipped with a commercial grade air-hydraulic pump requiring a maximum pressure of 125 PSI and 10-20 CFM. Extra lift gate fee may apply. Accessory Type Bridge jack. Capacity 18,000 lbs. Operation Rolling Designed for use with select BendPak lifts and other compatible lift brands and models. Please check size, width, capacity and compatibility of your lift before ordering"