The Atlas® Support Bar System is designed for use with scissor lift platforms when lifting heavier vehicles (pickup trucks and SUVs) with narrow frames.Many larger vehicles have "narrow" frames. When you lift these vehicles with our Atlas® solid platform scissor lifts or our Atlas® wheels free system (found on our Atlas® 12K alignment scissor lifts), the vehicles narrow frame exerts a downward force on the inside edges of the platform. Unibody style cars have a "wider frame area" that places the majority of vehicle weight over the CENTER of the platforms.The Atlas® Support Bar System helps to disperse the weight of the narrow frame vehicles toward the center of the platform.