Mdf Mdf Wide Use: This 5-tier storage rack includes 16pcs plastic feet to be put together into a shelving unit or a horizontal workbench. The frame is applicable but not limited to the basement, storage, home, bedroom, living room, kitchen, etc Steady & Safe: The middle supporting beam on each tier holds the MDF board firmly. Meanwhile, an anti-tipping over unit provides extra stability and safety. These goods racks have rubber feet for added stability and can also avoid damage to the ground and floor Anti-tipping Over: An anti-tipping over unit is provided for this storage shelf for extra stability and safety. You can fix this rack to the wall next to it Boltless Assembly: The boltless design allows a low technical-required assembly. All the necessary mountings, detailed instructions, and a pair of gloves are accompanied. That 2 people work together is suggested. A rubber mallet will also be very helpful (rubber mallet not included) Galvanized Metal Surface: The galvanized surface of this multi-layer storage unit with smooth edges is smooth and durable