Just a smaller version of this: https://www.printables.com/model/751962-ikea-lack-reinforcement

…and can also work nicely in combination with this print: https://www.printables.com/model/742895-ikea-lack-table-strong-and-robust-reinforcement-br

I created this model from scratch as I had printed and installed the linked model on my LACK table but I needed extra clearance underneath the front of the table for something to fit nicely underneath.

Hole size is 5.5mm and I've used 4.5mm screws on this myself with no issues.

Credit to the original author(s) for the inspiration for this.