simply organising all the measuring tools that I am using every day, so they are not flying around all the time. It just takes about 10x10cm of space and it takes: 2 kalipers, one 30cm metal ruler, 1 zollstock, 2 geodreiecke and 1 tape measure 5m that clips in like on your belt. I uploaded the scad file as well, in case you want to change it a bit to your needs. I hope it helps you too.