ALUMINUM STORAGE BOXES | CUSTOM SWISS LINK NESTING CASESYou neednt be a doomsday prepper to acquire these sturdy, all aluminum cases. They're great for securing any kind of tools or treasure you might have. These boxes are made to our specs using heavy 1mm thick aluminum sheeting, ribbing for strength, and heavily reinforced top corners made of aluminum castings. They are designed so that like sized cases can be stacked without them slipping off of each other and all three sizes can be nested together like