The pre-assembled storage rack features a frame that simplifies the assembly process, allowing you to attach the wheels in just a few simple steps for easy setup. This versatile 4-tier shelving unit offers extensive storage possibilities, making it ideal for organizing tools in the garage, kitchen supplies, or daily items in the living room and study. Equipped with 4 smooth rolling casters, two of which have brakes, the rack can be moved effortlessly and secured firmly in place when needed. Constructed with a rugged metal frame, the storage shelf is sturdy and stable, supporting up to 135 lbs, and includes an anti-toppling device to protect stored items. The space-saving design allows the 4-tier rack to be folded flat when not in use, with folded dimensions of 13.5" x 3.5" x 49.5" (L x W x H) and unfolded dimensions of 28" x 13.5" x 49.5" (L x W x H). The height between shelves measures 14.5", 13.5", and 13.5", and the net weight is 19.5 lbs. The storage rack comes in black metal and i