This is a Gridfinity bin for micrometers. It is designed to fit in a machinist tool box with 1.5" deep drawers. It holds two 1" micrometers, One 2" micrometer and One 3" micrometer. It also has storage for standards and other items. It can be printed without supports. I have included the STEP file so you can adapt to your own needs. It needs to be split in two in order to fit the 256 build plates.