Stacks ten high for maximum space savings. The higher the drawer system stacks, the more space, time and money you save. Steel framework interlocks vertically and horizontally to withstand the heaviest day-to-day usage. The strongest system made by Fellowes® is also the easiest to assemble. Drawers snap together with poly-lock technology and are reinforced with steel wire. Steel frame and reinforced drawers ensure full drawers open and close smoothly. Factory installed, high-impact drawer handle with index card holder for fast file retrieval (index cards included).