First, I measured and drilled the hole, then fully opened the pliers. I screwed the M8 rivet nut onto the pliers until it was almost flush with the pliers’ nut. I pushed the nut into the hole until it couldn’t go any further. It’s important to ensure the pliers reach the metal surface, so if there’s any wall protection like in my case, enlarge the hole in the protection first to allow the nut to be close enough to the metal for a secure hold.

Next, I pressed the handles together. It’s crucial to keep the pliers as straight as possible to avoid incorrect tension on the connector, which could cause breakage. You don’t need to bend the handles too much, though.

Then, I unscrewed the pliers counterclockwise by turning the large screw cap between the handles.

Finally, I screwed the bolt into the hole. Tightening it pulls the nut tighter into the metal, ensuring a secure fit.

I managed to secure my cabinet very firmly. If you’re unsure how to do it, there are helpful explanatory videos on YouTube.