Heavy-duty welded steel construction with a durable powder coat finish. Tray-style shelves with 1-3/4" side/back lip and 5/8" front lip support up to 200 lbs. each. Shelves extend fully on ball bearing slides and feature a built-in interlock system that prevents more than one shelf from opening at a time. Three-point locking system for security and four leg levelers to help compensate for uneven flooring.