Abstract: A strongbox having an integral antitheft mechanism. The antitheft mechanism is a plurality of rigid rod-like projections having a normal retracted position within a perimeter of the strongbox. The projections are maintained in this normal position by a lever which is associated with a handle for gripping to move the strongbox. If the manual lever is released actuating means provide for the rapid movement of the projections from the retracted position to a radial, extended position beyond the strongbox perimeter. These projections when in the extended position impair movement of the strongbox.