This is the ultimate invisible IKEA Lack Stacker!

If you want to stack more than one IKEA Lack tables ontop of each other, you found your solution! The stackers are easy to print and slide into the Lack's legs for invisible mounting. For a perfectly solid build you can use 4 stackers per table. Two will already give it a good fit. I recommend two to four screws per stacker.

They are designed for a tight fit, so if your printer is not well calibrated: reduce the size to 99 or 98%.

Enjoy!