Low cost scaffolding system. Set up on job site for painting, shingling, insulating, gutter work, masonry work, etc. Raised with positive action foot pedal and lowered by turning a crank. Adjustable to any height up to 30' and creates a 24" standing platform. Easy to set up and take down. Stores easily. Moves worker and materials to proper height for efficiency. Capacity: 25 lb. per sq. ft. with a maximum working load of 500 lb. For no more than 2 men per pair of pump jacks. Designed to be used with 2 straight 2"x4".