I've purchased them in bulk as they are EXTREMELY sturdy. That being said, in come Gorilla Gaming folding table legs. I've never had any complaints about the table not feeling stable or over wobbly. They're one of the best I've found for the price and will continue to use for a long time since they are affordable and relatively sturdy.
Each half is independent of each other so they can be installed anywhere underneath a table which is nice. I'm currently using a set which is square steel tubing in black/brown/white. I've searched for a very sturdy set of folding legs to use for my tables at a reasonable price for a while. I'm always looking to improve products we offer.