Portable toolboxes are sometimes called hand boxes or portable tool storage. Most portable toolboxes have one handle on top and a lid that opens on a hinge. Many have a removable tote tray that sits on the inside lip of the box, with a single larger compartment below. The tote tray helps organize smaller parts and accessories. Portable toolboxes sometimes use slide out trays or cantilever trays instead of removable tote tray. Most of these types of boxes are made of steel or plastic. Steel or metal toolboxes weigh more than plastic ones. A plastic toolbox laden with tools can weigh the same as a comparable steel box does when empty. Metal boxes are also subject to rusting and their sharp edges can mark the surfaces of things they are banged against. Metal is, however, known for being stronger than plastic, so one should balance its disadvantages against the need to withstand abuse and support the weight of many tools. Some of the top selling brands include Tradesman, Excel, and Homak. Portable chests are a type of tool storage that is small enough to carry, but has drawers to organize contents. Portable chests have a handle on top for portability and a top lid that opens on hinges. Portable chests typically have 3-4 drawers. Most are made from metal, but some have a plastic shell with metal drawers in order to help lighten the piece.