it's a plastic box with dividers, they stack, they can be sectioned with included dividers, & fit under a bed
Great for Computers & Parts, old Xbox's etc ..
Dividers lets me have, as a Example, Raspberry PI's, in Groups of Model & Accessories & Hats, Spare Displays in 1 Box ..
very hard to find a square sharp boxes the same measurement top and bottom these are working well in my camper with the dividers giving me better way to store my belonging, handles fold back under the lid which is also great as they don't stick out and get in the way.