A toolbox has a main casing part which confines first and second tool receiving compartments therein, and a first casing cover hinged to the main casing part and turnable between a folded position, wherein the first casing cover covers the first tool receiving compartment, and an open position, wherein the first tool receiving compartment is uncovered. The first casing cover confines a third tool receiving compartment therein. A second casing cover is hinged to the main casing part and is turnable between a folded position, wherein the second casing cover covers the second tool receiving compartment, and an open position, wherein the second tool receiving compartment is uncovered. The second casing cover confines a fourth tool receiving compartment therein. An inner tray is hinged to the second casing cover and is turnable between a folded position, wherein the inner tray covers the fourth tool receiving compartment, and an open position, wherein the fourth tool receiving compartment is uncovered. The inner tray extends into the second and fourth tool receiving compartments when the inner tray and the second casing cover are in the respective folded positions. The inner tray confines a fifth tool receiving compartment therein.

A tool box includes two upper covers each having an upper flange provided an upper clasp and a lower flange provided with a lower clasp which are configured to engage firmly with an upper and lower recesses of the base so as to keep the upper covers firmly engaged with the base, the upper cover being formed with a first groove at the upper flange and a second groove at the lower flange, the upper covers being provided with two parallel tracks a base formed with an upper flange and a lower flange respectively having two first grooves and two second grooves, the base being formed with two parallel tracks, two connecting members for joining together the upper covers with the base, the two connecting members having two parallel tracks, and two detachable containers having an upper raised edge and a lower raised edge configured and dimensioned to be sidably engaged with the grooves of the upper covers and the grooves of the base, whereby the two detachable containers can slide on a top of the base thereby increasing the capacity for receiving tools and causing much convenience in use.

A combination-type tool box comprises a polygonal main body and a plurality of receiving boxes fastened pivotally with the main body such that the receiving boxes can be rolled in series to rest against the longitudinal sides of the main body. The main body is provided therein with a receiving space for keeping tools having a relatively larger dimension. The receiving boxes are provided therein respectively with a plurality of tool slots for keeping tools of various dimensions as well as a variety of component parts.

The toolbox has a primary case, two add-on cases and four pivot pins. The primary case has a front casing and a rear housing. The rear casing has two pivoting sides, two locking hinges and multiple hinge barrels. The add-on cases are pivotally attached to the pivoting sides and each has a connecting casing and a pivoting housing. Each connecting casing is attached to one of the pivoting sides and each has multiple hinge barrels and a resilient clamp. Each pivoting casing is attached to the corresponding connecting casing oppositely to the rear casing and has a locking hinge, multiple hinge barrels and a slice. The pivot pins are separately pass through the locking hinges and the corresponding hinge barrels of the rear housing, the corresponding hinge barrels of the connecting casing and the locking hinges and the corresponding hinge barrels of the pivoting housing.

A tool box having (a) a first half having two first recesses formed therein, two anchors formed in the first recesses, two second recesses formed therein and two pairs of claws formed in the second recess and (b) a second half having two first recesses formed therein, two anchors formed in the first recesses, two second recesses formed therein and two pairs of claws formed in the second recess. The pairs of claws formed on the first half are insertable in the first recesses formed in the second half while the pairs of claws formed on the second half are insertable in the first recesses formed in the first half. The first half is then slidable relative to the second half so that the anchors and the pairs of claws formed on the first half respectively engage with the pairs of claws and the anchors formed on the second half. The first half is restrained from traveling relative to the second half in a direction being perpendicular to the first and second halves.