This is a handy organizer, which is bigger than it looks in the photograph. One of its good qualities, which is that the storage spaces can be changed to BIGGER is also its fault if you have thin, heavy items that can slip under the dividers mosaic tiles) I use it for larger collections of tiles, so maintaining dividers is not a problem. The three separate boxes can be removed one by one to access boxes separately or can be snapped together to carry or store. If you have relatively heavy items, like glass mosaic tiles, be sure all the latches are tight, or you support the bottom when you move it. I could see that it can have many uses besides my own, for separating embroidery threads for example. What I especially like is the fact that although there is much more storage space in this stackable unit, it is likely to save you space on your shelves.