Case for cheep component testers like these:
https://www.aliexpress.us/w/wholesale-lcr%2525252dt4-tester.html
https://www.amazon.com/s?k=lcr-t4+tester

Designed to be stackable within the Gridfinity system.

Assemble with 4 M3x10 screws.
For best result, trim the handle of the ZIF socket.

Easy print;
 * Built in supports
 * Parts already aligned for printing

Yes, all those odd cutouts including what seem to be holes in the bottom are intentional. It is a very tight fit!