Anyone use this electric fan mount?

I found these in the Jegs site and was wondering if anyone here has use them. I wanted to see how well they hold up? Also do the ends bolt on or do they "hook" on? How do they attach the fan to the rad., I am trying to mount dual LS1 fans. The rad is a stock 4 row for a 89 suburban ,looks likes your typical stock rad with no shell.

I have used those quite often-you can use tapping screws on the side as long as rad has an outer shell.

they hook in the the spans the go from the header tanks looks like you could use a small screw to hold the on i did do some work on the becool fan mounts this set up looks good