This is the third link I have received in as many months that is missing the Az lock hardware. The first time we noticed, they were already installed on the towers and we were back to repath. It turns out a couple zip ties will hold it long enough to make a round trip climb with hardware that fits. I figured it was a fluke. NOW 2 MORE LINKS! We have now ordered the $100+ heavier duty mounts to try so we no longer have to deal with the questionable hardware that comes in the box.