US car tool subframe connectors

I did not install them because the car has no rust, still has the factory undercoating. already had the floor painted, Dynamat and carpet installed. After I peeked into the box I realized it was the connectors that welded to the floor and not the box tubing type I had gotten in the past from safety cap people. I planned on selling these and buying the square tube ones from safety cap. This is the reason why I am selling these.
Thanks all