Selecting drawer slides may be more confusing than installing them. There are many types, and some overlap a bit. The easiest way is to figure out likely drawer weights, the drawer depth, and then the mounting needs. After that, check out available slides, within the following categories: Light duty slides: up to 75 pounds, usually plenty for residential cabinets. Medium duty slides: up to 120 pounds, again suitable for residential cabinets, especially those that you expect to be really loaded up. Heavy duty slides: load ratings range from 100 pounds to 500 pounds, which makes them great for lateral file drawers, large storage drawers and pantry pull-outs.