Created a sturdy and robust table connector for the IKEA Lack coffee table. Decided to construct my own as I needed sturdier connectors for my own application.

It requires: 12 x M5 X 30 mm Countersunk screws

!!! It's quite obvious but I'm gonna say it anyway: make sure to screw it onto the table first and then onto the legs. And of course pre-drill the hole or the wood may split.