My router came in a plastic tool box called a systainer.
It is made in a way that the bottom could interlock with the top. this means I could stack multiple of these boxes and lock them together for transport. I thought that this is a way to convince me to buy more tools from the same manufacturer.
But recently I noticed that the tool boxes of a professional carpenter from festo look similar and I wondered if they would be compatible with mine. In a store I that visited today I saw that tool boxes from hitachi had a suspiciously similar shape and locking system.
Are all these boxes in fact the same box system that different manufacturers use? Is this some kind of open standard like screw heads, bit diameters, etc.? Are the systainers from different brands compatible with each other? What other "features" does a systainer have?