Patent ID: 7334680

Claim:
A toolbox system comprising: a main compartment having a first configuration defined by a base, two opposed side walls, and two opposed end walls, the side walls and the end walls upstanding from the base to form an interior cavity for retaining tools, the side walls, the end walls and the base being formed of a rigid material; a lid hingedly attached to one of the side walls and a handle attached to the lid for carrying the toolbox; and, at least one modular attachment having a second configuration different than said first configuration and being smaller than said main compartment, said modular attachment removably secured to at least one of the side walls or end walls such that when secured to said at least one of the side walls or end walls expands the volume of the toolbox, said modular attachment including a portion that extends under said main compartment and is coextensive with the base when the modular attachment is secured to the base such that the modular attachment is supported by said portion.