This continuous-climbing, self-leveling, scaffolding system with 20,000-lb. capacity features a redesigned base and one-piece tower. Simply push a button to go up or down, without having to wait every 2 ft. for the cylinders to retract. The electro-hydraulic self-leveling system also has redundant, manual backup. Three separate levels of safety guard against fall, including self-engaging, springloaded safety dogs. Bennu Parts & Service Inc. 847-595-8444.