Smint box storage

WORK IN PROGRESS

I had a bunch of metal smint boxes because i thought that dumping them was a waste so I started to use them for organising my nuts, screws and small things, i started to paint them gray and to add stickers with the content so it was much more organised. But every time i opened the drawer when i have them, all the boxes were a total mess so i decided to designed a solution for keeping each box on it's place.

Edit 1: changed 1 to 2x2
Edit 2: added jigsaw coupling
Edit 3: fixed coupling size for better fitting