Shelf support is an important part of any shelving system. It can come in the form of bookends, brackets, lbars, and wallbrackets. Bookends are two pieces of material, usually metal or wood, that are placed at either end of a shelf to keep items from falling off. Brackets are similar to bookends, but they are usually made of metal and attach to the wall to support the shelf. Lbars are metal bars that are attached to the wall and used to support the shelf. Wallbrackets are metal brackets that attach to the wall and provide additional support for the shelf. All of these components work together to provide a secure and stable shelf support system.