6-Tier disassembly and free assembly NSF-Certified Steel Wire Shelving with Wheels 77426576Introduction: Use this ultra durable steel wire shelf to store more in a professional manner. This heavy duty steel wire storage system is designed for quick and easy assembly without the need for tools. Simply screw the power poles together, connect the wheels or feet, and then clamp the rack to complete the task. The shelves are made of solid steel wire and rough material, used for true commercial grade storage. These units are listed by the