OBI "Euro-Box" lock

I'm using storage boxes from OBI (kinda homedepot in Germany) - https://www.obi.de/aufbewahrungsboxen/eurobox-system-box-vollwand-mit-griffmulden-40-x-30-x-22-cm-transparent/p/4204921 - to store filament spools. They also sell tops for the boxes - https://www.obi.de/aufbewahrungsboxen/eurobox-system-deckel-fuer-box-40-x-30-cm-transparent/p/4204947 - but even as there are holes for something to fix the tops to the boxes, these “fixation items” are nowhere to find. So I made them myself.

You'll need 2 to 4 bolts and sliders per box

Oh, BTW: With some silicone, spool rollers and holes in the side wall these boxes are something like a primitive MMS :-D