Material of Metal boxes

Metal toolboxes (typically steel) weigh more than plastic ones. A plastic toolbox laden with tools can weigh the same that 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.