The Muscle Rack 4-shelf welded steel storage rack keeps your bulky items organized in your basement, workshop, garage, business, or anywhere heavy-duty vertical storage is needed. Its industrial-grade welded steel end frames, heavy-duty steel beams, and middle tie bars provide dependable strength, supporting a total weight capacity of 8,000 pounds. The frames black textured finish offers long-lasting durability and helps conceal workshop dirt and dust. This sturdy shelving unit includes three steel wire shelves that can store a wide variety of items, large or small, and can be adjusted in 1.5-inch increments. The rack features a dual-locking system that allows you to expand your storage using additional shelving units. Tabbed beam brackets lock into the end-frame post slots for quick and easy assembly with the help of a rubber mallet (not included). Once assembled, the unit measures 77" W 24" D 72" H.