Ikea's Lack tables are very convenient to build 3D printers enclosures, because they are extremely cheap and rather light.

But their legs are a bit short, espcially if you have a Prusa I3 MK3 with the MMU2s and if you want to put the spools on top.

There are many prolongator designs, but if you need a little more length, using lengths of the original feet is more convenient.

That is when the foot connectors is the most simple solution! It requires no screw, nail or glue.

This item is designed to connect the legs so that you can put one table upside down and another one on top, for instance.

Well, check the pictures, they explain better :)