Our 4-Tier Horizontal Rack with 4 Uprights is purpose-built to hold up to 2,000 lbs of equipment. It accommodates dumbbells, weight olympic plates, medicine balls, and kettlebells with optional Flat Panel Add on. Crafted from its sturdy 3x3" steel uprights, the 4-Tier Horizontal Rack can also hold landmines, battle rope attachments, barbell holders, and plate holders. With 4 uprights, this version supports up to 2 sets of available Alpha or Alpha Elite Vertical Add-ons, allowing you to upgrade this piece for added vertical dumbbell storage whenever you are ready. 4-Tier Support & Maximized Spacing: Our 4-Tier Horizontal Rack with 4 Uprights was designed to maximize your storage space and can hold anywhere from 15-25 pairs of dumbbells depending on your add-ons. Double the Vertical Storage: With 4 uprights instead of 2, you can mount up to 2 sets of Alpha vertical add-ons, doubling your vertical dumbbell storage capacity compared to the standard 2-upright version. Hold Accessories: The 4-Tier Horizontal Rack uprights allow you to store landmines, battle rope attachments, barbell holders, and plate holders, all with the exact same footprint. Adjustable Shelving: Each shelf and L-angle dumbbell support unit on our horizontal rack can be adjusted to tilt forward and backward, making your dumbbells easy to access on any tier. Solid and Dependable: The 11 gauge steel frame guarantees outstanding stability, and rubber feet are included to prevent any sliding or floor damage, particularly on hardwood or tile surfaces. Easy to Assemble: The simplicity of our dumbbell rack is its charm. This rack can be set up in just a few minutes with all the tools you need included in your purchase.