We say this is really useful because you can tote it around in your van without spilling the contents. The system features a "double lock" closure on each storage box which should ensure retention of components stored. There are 12 storage compartments, 2 x large measuring 295(W) x 65(D) x 65(H)mm (all are 65(D) x 65(H)mm), 4 medium 145(W) and 6 small measuring 95(W)mm.
The attaché-case outer carrying case measures 300(W) x 310(H) x 145(D)mm. The whole thing is held together with snap locks and 4 hinges.
This is a commercial grade "Tradies" product.