Metal CONVENIENT AND ORGANIZED: Conveniently store your flattened cardboard, simplifying recyclables management and keeping it organized and off the floor EASY-TO-ASSEMBLE: All FastTrack rails and accessories are fast and easy to assemble COMPATIBLE WITH ALL FASTTRACK: Easily expand and customize your space with easy install rails, hooks, baskets, bins and shelves TRUSTED QUALITY: FastTrack system delivers quality steel construction backed by our Limited Lifetime Warranty FASTTRACK GARAGE: Part of Rubbermaid FastTrack Garage's Storage Hook collection, for all your garage hanging needs