SmartWall Single Shelf Supports can be paired with SmartWall Uprights for an easy-to-adjust wall shelving system. Supports attach directly to uprights without the use of tools or additional hardware. Single Shelf Supports are suitable for use with Super Erecta, Super Erecta Pro, and MetroMax shelves. Please note that MetroMax 4 and MetroMax i shelves require one shelf adapter kit per shelf (sold separately). Shelves require two shelf supports to be appropriately held on the wall shelving unit. Side-by-side wall shelving units can be created by combining Single Shelf Supports with a Double Shelf Support.