There are plenty of personalizing and preferential choices that can be made when choosing pull-out shelves. Though simple wood slides can be used, modern cabinetry typically will incorporate rails like those used for drawers. Because the shelf is designed to move, there will usually be a lip or edge around the perimeter of the shelf to keep things from sliding off. Upgrading to this style of shelving is a great way to increase convenience but it does reduce the support strength for a given shelf. If one is planning to place heavy items such as canned foods or jars, it is important to use an appropriately thick piece of wood for the shelving platform in addition to a strong sliding system.