Abstract: A Dual T-Lock Apparatus for T-handle latch assemblies mountable on toolboxes is a transverse lock rod connecting two T-handle latch assemblies and apparatus mounted on each T-handle latch assembly such that one latch assembly can be released, automatically releasing, through the transverse lock rod, the other latch assembly. A Dual T-Lock comprises two T-handle latch assemblies provided with the Dual T-Lock Apparatus. A toolbox is provided that fitted with a Dual T-Lock and suitable for use in a truck. A toolbox is provided that is fitted with T-handle latch assemblies fitted with a Dual T-Lock Apparatus.