Hello, I am writing regarding the bike rack I purchased recently. The first time I put it on my car and tried to take it off – it broke. More specifically, the thread on the bolt that fixes the rack to trailer hitch broke. The thread on the bolt and one of the nuts inside the rack arm broke with the bolt halfway through. Thus, it was neither possible to unscrew the bolt and take the rack off the car, or screw the bolt in and fix the rack on the car (the rack was wobbling with the bolt half way through). I had to saw off the rack arm that connects to the hitch and insert a screwdriver into the opening that fixed one of the loose nuts in place. That allowed to unscrew the bolt and take the remaining part of the rack arm out of the hitch. I see two design flaws with the rack, that combined lead to the described critical failure. 1. The bolt is supposed to go through two nuts and the same time. Unless both nuts are perfectly aligned, putting a bolt through two nuts destroys the thread on the bolt. 2. The nuts are supposed to be kept in place by thin plastic. Once the plastic brakes, a nut becomes loose, and makes it impossible to unscrew the bolt.