The Elite Series Mass Storage System is perfect for storing and organizing dumbbells, kettlebells, and slam balls in your home gym. It comes in 2-tier or 3-tier configurations with 42" or 70" adjustable shelves to suit your needs. Each shelf can be angled to three different positions. Tilt it downward with the lip in the front at a 20 or 30-degree angle for secure dumbbell storage or keep it flat with the lip in the back to hold kettlebells and slam balls. Each shelf supports up to 1,000 LB, and the core units feature heavy-duty bolt-down uprights and side-bracing for durability and stability. It's easy to assemble with the included hardware and fully customizable with Elite Series add-ons like bumper plate shelves and weight plate holders.For added convenience, you can add optional caster wheels to easily move and lock the system in place.CAUTION - Do not move your non-wheeled Mass Storage System without first unloading plates, dumbbells, kettlebells, and all other items. For best performance on non-wheeled Mass Storage Systems, we recommend bolting your unit to the floor.