This boltless storage shelf is a very universal and strong garage shelf. Boltless design is for convenient assembly. This 5-tier rack is supported by a galvanized, strong metal frame. The powder-coated surface treatment gives it a textured look and water and scratch-resistance, ensuring it keeps as good as new without peeling off or oxidation after long-time usage. This 5-tier storage rack is constructed of a high-quality steel frame and CARB P2 MDF board, capable of firmly holding up to 330 lb. The 5 shelves of this rack are all adjustable for getting items in different sizes well-settled. In addition to vertical assembly, you can also put this rack together into your needed form. Such flexible designs maximize the usage of this rack to its greatest extent.Comprising 5 adjustable tiers, each of which measures 27.2″ L × 11.5″ W. This rack can accommodate most of the daily used items at home, or goods in supermarkets, warehouses, and anywhere with storage needs.