The Wire, Solid, and Perforated Roll-out style Shelves are a true labor-saver; the efficient design allows these shelves to be smoothly rolled out of the cart for easy loading and unloading. The continuous flow front and back edges are designed to increase the shelf strength. The back edge is flanged up to prevent stored items from falling off the back as the shelf is rolled out. The front edge is flanged down to provide a smooth, waterfall, edge-free surface for supporting the heaviest loads. The Suspension Tracks are adjustable and suspended from the cart's shelf brackets. The shelves ride on polyethylene bearings and, when rolled out, extend 14.75" past the cart's face to a positive stop preventing accidental removal.