The RYOBI LINK Modular Storage System is revolutionizing the storage industry, enabling you to Organize, Access and Transport your life. The RYOBI LINK 21" Solid Shelf is designed to be used with the LINK 2-in-1 Shelving Brackets. Use two 2-in-1 brackets to hold one shelf or add a third bracket to hold two shelves next to each other, sharing the middle bracket. Continue to expand your shelving system by adding one additional bracket and shelf in a row, providing 3.5' of shelf space. Shelves are elevated on top of brackets to allow hooks to be placed on Wall Rail under shelf for additional storage. The integrated drip tray keeps your space clean, catching any spills or messes. Best of all, it is part of the RYOBI LINK Modular Storage System line of products that use the same locking technology to seamlessly connect your mobile and stationary storage needs. Own your space with RYOBI LINK Modular Storage System.